The role of canopy structure in the spectral variation of transmission and absorption of solar radiation in vegetation canopies. - Oleg Panferov; Yuri Knyazikhin; Ranga B. Myneni; Jörg Szarzynski; Stefan Engwald; Karl G. Schnitzler; Gode Gravenhorst (IEEE Trans. Geosci. Remote. Sens., 2001)