%0 Journal Article %A A. N. Sevchenko %A S. F. Shkirman %A V. A. Mashenkov %A K. N. Solov'ev %T Low-temperature polarization spectra of asymmetric aza-benzoporphirines and their metal derivatives %J Doklady Akademii Nauk %D 1967 %P 545-548 %V 175 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1967_175_3_a10/ %G ru %F DAN_1967_175_3_a10