%0 Journal Article
%A B. S. Mityagin
%T On second mixed derivative
%J Doklady Akademii Nauk
%D 1958
%P 606-609
%V 123
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1958_123_4_a6/
%G ru
%F DAN_1958_123_4_a6