%0 Journal Article %A V. T. Fomenko %A S. B. Klimentov %T Nonbendability of closed surfaces of genus $p\geqslant1$ and positive extrinsic curvature %J Sbornik. Mathematics %D 1976 %P 361-372 %V 30 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1976_30_3_a5/ %G en %F SM_1976_30_3_a5