2. Sapar A., Viik T.: On the Theory of Extended Stellar Atmosphere, Tartu Publ. 36, 120-143, 1967 (In Russian).

3. Viik T.: On the Temperature-Correction Method in a Stellar Atmosphere, Tartu Teated No.19, 25-33, 1967 (In Russian).

4. Sapar A., Viik T.: Determination of Temperature and Pressure in the Extended Stellar Atmospheres, Tartu Teated No 19, 15-24, 1967 (In Russian).

5. Viik T.: Radiative Transfer in a Spherical Atmosphere of Free Electrons. I. Scattering by Unmoving Electrons, Tartu Teated No 19, 71-89, 1967 (In Russian).

6. Viik T.: Radiative Transfer in a Spherical Atmosphere of Free Electrons. II. Scattering by Electrons in Thermal Motion, Tartu Teated No 19, 91-109, 1967 (In Russian).

7. Bolshakova G.I., Bronnikova N.M., Viik T.F.-L., Demidova A.N., Zhukova L.N., Sukhonos A.F., Shakht N.A.: A Quality of Star Images at Seven Points of the Caucasus, Pulkovo Proceedings 24, 255-257, 1967 (In Russian).

8. Viik T.; Radiative Transfer in a Moving Spherical Stellar Atmosphere, Tartu Publ 38, 46-56, 1970 (In Russian).

9. Viik T.: Radiative Transfer in a Spherical Atmosphere of Free Electrons, Proceedings of Estonian Acad. Sci. Phys-Math. Ser 19, 184-195, 1970 (In Russian).

10. Viik T.: On Solving the Spherical Transfer Equation, Proceedings of Estonian Acad. Sci. Phys-Math. Ser 19, 286-291, 1970 (In Russian).

11. Viik T.: Solution of the Equation of Transfer for Spherical Atmosphere by the Method of Grant and Hunt, Tartu Publ. 39, 3-33, 1971 (In Russian).

12. Viik T.: Solution of the Equation of Transfer for Spherical Atmosphere by the Method of Regional Averaging, Tartu Publ. 39, 34-43, 1970 (In Russian).

13. Viik T.: Method of Regional Averaging In the Radiative Transfer, Proceedings of Estonian Acad. Sci. Phys-Math. Ser 20, 285-288, 1971 (In Russian).

14. Viik T.: Radiative Transfer in an Extended Spherical Stellar Atmosphere, Abstract of the candidate's thesis, 8 pages, Tartu, 1970 (In Russian).

15. Viik T.: Radiative Transfer in Homogeneous Spherical Shell Atmospheres, Tartu Publ. 42, 3-21, 1974.

16. Viik T.: A Modified Regional Averaging Method, Tartu Publ. 42, 22-37, 1974.

17. Viik T.: A Modified Regional Averaging Method II. Comparison with the P-3 Approximation, Tartu Publ. 42, 22-37, 1974.

18. Viik T.: On Grey Absorption Coefficients in Radiative Transfer, Tartu Publ. 43, 233-249, 1975.

19. Viik T.: The Milne and the Albedo Problems in the P-5 Approximation, Tartu Publ. 44, 58-71,1976.

20. Viik T.: On an Exact Solution of the Ambartsumian Equation, Tartu Publ. 44, 47-57, 1976.

21. Viik T.: Some Aspects of Astrophysical Research at Tartu Astrophysical Observatory, Soviet-Finnish Astronomy Meeting, Helsinki, June 10-15, 1975 (In Finnish).

22. Viik T.: On the Solution of the Equation for the Source Function of the Albedo Problem, Tartu Publ. 44, 72-90, 1976.

23. Viik T.: Numerical Results for the Source Function of the Albedo Problem in the Case of Semi-Infinite Medium, Tartu Publ. 45, 13-33, 1977.

24. Viik T.: On the Solution of the Chandrasekhar's Planetary Problem, Tartu Publ. 45, 3-12, 1977.

25. Viik T.: Source Functions for an Isotropically Scattering Homogeneous Slab Bounded by a Perfect Specular Reflector, Proceedings of Estonian Acad. Sci. Phys-Math. Ser 26, 148-151, 1977.

26. Avaste O., Viik T., Dmitriyeva-Arrago L.: On the Absorption of Solar, Diffuse and Reflected Radiation in the Visible Region of the Spectrum, Izv. Acad. Sci. USSR Atmos. Oceanic Phys. 14, 932-938, 1978 (In Russian).

27. Viik T.: The Source Function for a Planetary Atmosphere, Tartu Publ. 46, 251-262,1978.

28. Viik T.: The Source Function in an Inhomogeneous Atmosphere, Tartu Publ. 46, 43-54, 1978.

29. Viik T., Heinlo A.: Radiative Transfer in a Finite Slab by Kernel Approximation, Tartu Teated No 56, 37-54, 1978.

30. Rahi M., Viik T.: Stone Labyrinths in Estonia, Eesti Loodus No 5, 315-317, 1978 (In Estonian).

31. Viik T.: New Methods for Determining the Radiation Field in a Slab, Tartu Publ. 47, 3-19, 1979.

32. Viik T.: Radiative Transfer in a Planetary Atmosphere, Tartu Publ. 47, 20-44, 1979.

33. Heinlo A., Viik T.: Radiation Fields for Isotropically Scattering Finite Atmospheres Bounded by Reflecting Surfaces, Tartu Publ. 48, 63-80, 1981.

34. Viik T.: The Source Function in a Finite Inhomogeneous Atmosphere with Internal Sources, Tartu Publ. 48, 10-24, 1981.

35. Heinlo A.,Viik T.: On a Rapid Algorithm for Evaluation of the Voigt Function, Tartu Teated No 64, 24-31, 1981 (In Russian).

36. Viik T.: The Radiation Field in an Inhomogeneous Atmosphere, Tartu Teated No 65, 3-10, 1981 (In Russian).

37. Rôôm R., Kärner K., Viik T.: Asymptotic Behaviour of the Resolvent Function in Radiative Transfer, Tartu Publ. 48, 25-40, 1981 (In Russian).

38. Viik T.: Radiation in Multilayered Isotropically Scattering Atmosphere, Astrofizika 17, 673-686, 1981 (In Russian).

39. Viik T.: On the Approximation Formula in Radiative Transfer, Tartu Publ. 49, 28-39, 1982.

40. Viik T.: An Analytical Approximation of the Resolvent, Tartu Teated No 66, 38-50, 1982.

41. Viik T.: A Generalized Principle of Invariance and Radiation Field in Multilayer Atmospheres, Astrophys. Space Sci. 86, 169-178, 1982.

42. Hansen T., Viik M., Viik T.: Biochemical Changes and Some Physical Parameters Characteristic of the Pupae of Formica Aquilonia Yarr.(Hymenoptera, Formicidae) During the Summer, Revue d'Entomologie de l"URSS 61, 738-745, 1983 (In Russian).

43. Viik T.: Solutions of Some Problems in Radiative Transfer, Tartu Publ. 50, 38-49, 1984 (In Russian).

44. Viik T.:On the Hopf Constant, manuscript 4 pages, not accepted by the Pis'ma v Astron. Zhurnal, 1984 (In Russian).

45. Viik T., Rôôm R., Heinlo A.: A Method of the Resolvent Function Approximation in Radiative Transfer, Tartu Teated No 76, 131 pages, 1985 (In Russian).

46. Viik T.: Radiation Field in Multilayer Media, Tartu Teated No 79, 3-90, 1985.

47. Pôldoja P., Viik T.: Calculations of Ionization Potential by the Number of Interactions Between Structure Units I. Alkynes, Proceedings of Estonian Acad. Sci. Phys-Math. Ser 35, 86-92, 1986 (In Russian).

48. Pôldoja P., Viik T.: Calculations of Ionization Potential by the Number of Interactions Between Structure Units II. Aldehydes and Ketones, Proceedings of Estonian Acad. Sci. Phys-Math. Ser 35, 163-167, 1986 (In Russian).

49. Pôldoja P., Viik T.: Calculation of Ionization Potential by the Number of Interactions Between Structure Units IV. Alkenes and Cycloalkenes, Organic Reactivity 22, 295-309, 1985.

50. Viik T.: A New Initial-Value Method for Determining the Radiation Field in a Plane-ParallelAtmosphere.I. The Scalar Case, manuscript, 14 pages.

51. Viik T.: An Efficient Method to Calculate Ambarzumian- Chandrasekhar's and Hopf's Functions, Astrophys. Space Sci. 127, 285-307, 1986.

52. Viik T.: Calculation of Radiation Field in a Homogeneous Anisotropically Scattering Plane-Parallel Atmospheres, Tartu Teated No 85, 3-46, 1987 (In Russian).

53. Viik T., An Initial-Value Method for Determining the Radiation Field in a Plane-Parallel Atmosphere. The Vector Case, Transport Theory and Statistical Physics 19, 273-291, 1990.

54. Pôldoja P., Viik T.: Additivity in the Framework of Electrostatic Model I. The Enthalpy of Formation of n-Alkanes, Proceedings of Estonian Acad. Sci. Phys-Math. Ser 38, 87-94, 1986 (In Russian).

55. Viik T.: Rayleigh Scattering in a Homogeneous Plane-Parallel Atmosphere, Tartu Teated No 96, 3-80, 1989 (In Russian).

56. Viik T.: Rayleigh Scattering in Planetary Atmospheres, Earth, Moon, and Planets 46, 261-284, 1989.

57. Viik T.: Flux and Polarization Reflected from a Non-Conservative Rayleigh-Scattering Planetary Atmosphere, Earth, Moon, and Planets 48, 41-48, 1990.

58. Viik T.: On the Derivatives of the H-Function, Astrophys. Space Sci. 165, 343-344, 1990.

59. Viik T.: Rayleigh-Cabannes Scattering in Planetary Atmospheres II. Constant Internal Sources in Nonconservative Atmospheres, Earth, Moon, and Planets 49, 149-161, 1990.

60. Viik T.: Rayleigh-Cabannes Scattering in Planetary Atmospheres III. The Milne Problem in Conservative Atmospheres, Earth, Moon, and Planets 49, 163-175, 1990.

61. Viik T.: Rayleigh-Cabannes Scattering in Planetary Atmospheres, Proceedings of the Nordic-Baltic Astronomy Meeting, 365-368, Uppsala, 1990.

62. Viik T.: Labyrinths around the Baltic, Interdisciplinary Seminar in Hämeenlinna, 51-54, 1990.

63. Viik T.: The X, Y and H-Matrices for Molecular Scattering, 10th European Regional Meeting in Astronomy, Davos, poster report, 1990.

64. Viik T.: On a Classical White Dwarf with Minimal Dimensionless Radius, manuscript, 5 p., 5 Figures, 1991.

65. Viik T.: The X, Y and H-Matrices for Molecular Scattering, Astrophys. Space Sci. 178, 133-145, 1991.

66. Viik T.: Numerical Realization of Analytical Methods in Theory of Radiative Transfer, Thesis (D. Sc. in astronomy), Tartu, 44 p. 1991.

67. Viik T.: External Radiation Field in Rayleigh-Cabannes Atmospheres with Constant and Linear Sources, Astrophys. Space Sci. 198, 265-280, 1992.

68. Viik T.: Source Vector in Rayleigh-Cabannes Scattering Atmosphere. The Non-Conservative Milne Problem, Astrophys. Space. Sci. 200, 129-143, 1993.

69. Viik T.: The Effect of Reflecting Boundaries on the Polarized Radiation Field, Astrophys. Space Sci. 204, 97-110, 1993.

70. Viik T.: Derivatives of H-Function, Astrophys. Space Sci. 204, 213-231, 1993.

71. Viik T.: The Complex H-Function, Astrophys. Space Sci. 209, 255-265, 1993.

72. Viik T.: Photon Path-Length Distribution Function I. Rocard Scattering, Astrophys. Space Sci. 211, 307-322, 1994.

73. Viik T.: Photon Path-Length Distribution Function II. Rayleigh-Cabannes Scattering, Astrophys. Space Sci. 222, 47-63, 1994.

74. Viik T.: Average Photon Path-Length in Isotropically Scattering Finite Atmospheres, Astrophys. Space Sci. 225, 205- 219, 1995.

75. Viik T.: Average Photon Path-Length of Radiation Emerging from Finite Atmospheres I. Henyey-Greenstein Phase-Function, Astrophys. Space Sci. 232, 37-48, 1995.

76. Viik T.: Average Photon Path-Length of Radiation Emerging from Finite Atmospheres II. Impact of Polarisation, Astrophys. Space Sci. 232, 49-64, 1995.

77. Ivanov V.V, Kasaurov A.M., Loskutov V.M., Viik T.: Generalized Rayleigh Scattering II. Matrix Source Functions, Astron. Astrophys. 303, 621-634, 1995.

78. Viik T.: Average Photon Path-Length of Radiation Emerging From Finite Atmosphere, Proceedings of Estonian Acad. Sci. Phys-Math. Ser 45, 355-367, 1996.

79. Viik T.: Teoreetilise astrofüüsika alused, loengukursus, V+170 lk., 1998 (In Estonian).

80. Viik T.: Radiation Field in Rayleigh-Cabannes Scattering Atmosphere. The Nonconservative Milne Problem, Journal of Quant. Spectr. Rad. Transfer 66, 581-590, 2000.

81. Viik T.: The Pomraning Phase Function: How Good Is It? Journal of Quant. Spectr. Rad. Transfer 68, 319-326, 2001.

82. Viik T.: Temperature Distribution in a Semi-Infinite Atmosphere Subjected to Cosine Varying Collimated Radiation, Proceedings of Estonian Acad. Sci. Phys-Math. Ser 49, 40-57, 2000.

83. Viik T.: Temperature Distribution in a Finite Atmosphere Subjected to Cosine Varying Collimated Radiation, Proceedings of Estonian Acad. Sci. Phys-Math. Ser. 49, 108-121, 2000.

84. Viik T., McCormick N.J.: Approximate polarization calculations with scalar radiative transfer theory, Journal of Quant. Spectr. Rad. Transfer, 74, 369-375, 2002.

85. Viik T., Vurm I.: Radiation Field in an Atmosphere Subjected to Cosine Varying Diffuse Radiation, Proceedings of Estonian Acad. Sci. Phys-Math. Ser. 50, 214-226, 2001.

86. Viik T., McCormick N.J.: Approximate Phase Function for Rayleigh Scattering, Theses of the All-Russian Astronomy Conference, St-Petersburg, p. 33, 2001.

87. Viik T., Temperature Distribution in a Semi-infinite Atmosphere Subjected to Cosine Collimated Radiation, Kinematics and Physics of Celestial Bodies, Suppl. Ser., No 3, 194-197, 2000.

88. Viik T., McCormick N.J.: Numerical test of an inverse polarized radiative transfer algorithm, Journal of Quant. Spectr. Rad. Transfer, 78, 235-241, 2003.

89. Viik T., The Tartu Period of F.W.G.Struve, Reports of the International Scientific Conference STRUVE ARC 150, 56-60, Tallinn - Tartu, 2002.

90. Vurm I. , Viik T.: Emissive power and flux in an atmosphere subjected to a finite strip of radiation, Proceedings of Estonian Acad. Sci. Phys-math. Ser. 52, 207-220, 2003.

91. Viik T., McCormick N.J.: Numerical test of an inverse problem algorithm for polarized radiative transfer, Abstracts of the NATO Advanced Study Institute on Photopolarimetry in Remote Sensing. Ed. G. Videen, Y. Yatskiv, A. Vid'machenko, V. Rosenbush and M. Mishchenko, p.101, 2003.

92. Viik T., McCormick N.J.: Quadratic integrals in inverse problems with multiple scattering, G. Videen et al. (Eds.), Photopolarimetry in Remote Sensing, p.125-136, Kluwer Academic Publishers, 2004.

93. Viik T.: How F.G.W. Struve started his ambitious project?, Report at the conference "The Future of the Struve Geodetic Arc", Chisinau, Moldova, 27.09. - 29.09.2004.

94. Viik T., McCormick N.J.: Polarized radiation deep in an atmosphere, Journal of Quant. Spectr. Rad. Transfer, 96, 35-43, 2005.

95. Viik T.: Universumi füüsika, Loengukursus, V+316 lk., 2005, (In Estonian).

96. Viik T.: Tähtede füüsika, Loengukursus, V+274 lk., 2006, (In Estonian).

97. Viik T.: F.W. Bessel and Geodesy, "Struve Geodetic Arc 2006 International Conference: The Struve Arc and Extensions in Space and Time", Haparanda and Pajala, Sweden, 13-15 August 2006, LMV-Rapport, Ed. Hans-Fredrik Wennström, p. 53 - 63, Gävle, 2006.

98. Viik T.: F.W. Bessel ja geodeesia, Geodeet 35 (59), 74-78, 2007, (In Estonian).

99. Viik T., Rõõm, R.: Radiation field in a semi-infinite homogeneous atmosphere with internal sources, Journal of Quant. Spectr. Rad. Transfer, 109, 363-377, 2008.

100. Viik T.: Carl Friedrich Tenner - vene geodeesia rajaja, Geodeet 36 (60), 50-59, 2008, (In Estonian).

101. Viik T.: Eesti astronoomia ja geodeesia alguspäevadest, Geodeet 38/39, 53-60, 2009, (In Estonian).

102. Viik T.: Radiation field in a finite homogeneous atmosphere with internal sources, Journal of Quant. Spectr. Rad. Transfer, 111, 1418-1425, 2010.

103. Viik T.: Heinrich Christian Schumacher - from lawyer to astronomer, Historiae Scientiarum Baltica 2010, Abstracts of the XXIV International Conference on the History of Science, 89-90, Dept of International Relations, Tallinn University of Technology, Tallinn, 2010.

104. Viik T.: Heinrich Christian Schumacher - geodeet ja astronoom, Geodeet 40, 83-88, 2010, (In Estonian).

105. Viik T.: Matemaatilise füüsika võrrandid, Loengukursus, IV+216 lk., 2011, (In Estonian).

106. Viik T.: Matemaatilise füüsika võrrandid. Ülesanded ja lahendused, II+108 lk., 2011, (In Estonian).

107. Viik, T., Randjärv, J.: How Struve and Tenner started the work of their life, Baltic Astronomy, 20 , no 2, 169-178, 2011.

108. Viik, T.: Soome astronoomia ja geodeesia alguspäevad ning Friedrich Wilhelm August Argelander, Geodeet 41, 94-99, 2011.

109. Viik, T.: La vie mouvementée de P.L. Moreau de Maupertuis, L'Astronomie, 44, p. 32-37, 2011 (inglise keelest prantsuse keelde tõlkinud S. Héral).

Last updated: December, 2011