%0 Journal Article %A N. G. Perlova %T On the relation between the rigidity of order $k>3$ and analytic nonformability of surfaces %J Žurnal matematičeskoj fiziki, analiza, geometrii %D 1995 %P 456-462 %V 2 %N 3 %U http://geodesic.mathdoc.fr/item/JMAG_1995_2_3_a15/ %G ru %F JMAG_1995_2_3_a15