%0 Journal Article %A R. G. Kostyanovsky %T Reaction of ethylenimine with formaldehyde %J Doklady Akademii Nauk %D 1960 %P 853-856 %V 135 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1960_135_4_a22/ %G ru %F DAN_1960_135_4_a22