Kuusk, A.: A Markov Chain Canopy Reflectance Model, Agricult. Forest Meteorol. 76, 221-236, 1995.
Nilson, T. and Olsson, H.: Effect of Thinning Cutting on Boreal Forest Reflectance. Int. J. Remote Sensing 16, 2963-2968, 1995.
Veismann U.: Calibration of Radiometers for Remote Sensing of the Earth's Atmosphere from Space. Meteorologie 32, No 6.