%0 Journal Article %A D. I. Shil'krut %T A symmetry theorem for shallow forms of equilibrium of geometrically nonlinear shallow and nonshallow shells %J Doklady Akademii Nauk %D 1969 %P 64-67 %V 187 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1969_187_1_a16/ %G ru %F DAN_1969_187_1_a16