%0 Journal Article
%A V. I. Zhegalov
%A A. N. Mironov
%T Three-dimensional characteristic problems with normal derivatives in boundary conditions
%J Differencialʹnye uravneniâ
%D 2000
%P 833-836
%V 36
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_2000_36_6_a16/
%G ru
%F DE_2000_36_6_a16