%0 Journal Article %A N. P. Shusherina %A N. D. Dmitrieva %A R. Ya. Levina %T $\delta$-Lactones and $\delta$-lactams. Chloromethylation of pyrones-2 %J Doklady Akademii Nauk %D 1962 %P 1113-1116 %V 146 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1962_146_5_a34/ %G ru %F DAN_1962_146_5_a34