%0 Journal Article %A V. A. Pilipovich %A B. Ya. Sveshnikov %T On the possible existence of several phosphorescence levels in organic luminophores %J Doklady Akademii Nauk %D 1958 %P 59-61 %V 119 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1958_119_1_a14/ %G ru %F DAN_1958_119_1_a14