KRIEBEL K.T., 1978 - Terminology of reflection. Proc. Int. Symp. I.S.P.
IUFRO.Freiburg In. Br. 2-8 July 1978. 3 p.
SIEVERS J., 1977 - Density corrections and directional reflectances of
terrain objects from black and white aerial photos.
Photogrammetria 33. 95-112
SMITH J.A., OLIVER R.E., KILPELA O.D., 1973 - Effects of changing
canopy directional reflectance on feature selection. In
Remote Sensing earth resources II. Select. Pap. 2 nd
resour. Conf. Tublahoma Tenn. Tublahoma. F. Shakrokhi
629-641
SUITS G.H., 1972 - The calculation of the directional reflectance
of vegetative canopy. Remote Sens. Environ. 2. 117-2125