%0 Journal Article
%A S. A. Bogatyi
%T On the preservation of shapes under mappings
%J Doklady Akademii Nauk
%D 1975
%P 261-264
%V 224
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1975_224_2_a1/
%G ru
%F DAN_1975_224_2_a1