%0 Journal Article %A K. Sh. Karaev %A N. G. Furmanova %A N. V. Belov %T On the crystal- and molecular structure of spiropyran, $\mathrm{C}_{18}\mathrm{H}_{15}\mathrm{NO}_4$ %J Doklady Akademii Nauk %D 1981 %P 1121-1124 %V 260 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1981_260_5_a21/ %G ru %F DAN_1981_260_5_a21