%0 Journal Article
%A G. Kh. Sindalovskii
%T Congruent and asymptotic differentiability
%J Doklady Akademii Nauk
%D 1963
%P 995-997
%V 150
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1963_150_5_a10/
%G ru
%F DAN_1963_150_5_a10