%0 Journal Article %A G. R. Gulgazaryan %T The spectrum of a moment-free operator in the theory of thin shells of revolution %J Differencialʹnye uravneniâ %D 1974 %P 41-52 %V 10 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1974_10_1_a5/ %G ru %F DE_1974_10_1_a5