%0 Journal Article
%A V. V. Katrakhov
%A S. M. Sitnik
%T A composition method for constructing $B$-elliptic, $B$-hyperbolic
%J Doklady Akademii Nauk
%D 1994
%P 307-311
%V 337
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1994_337_3_a4/
%G ru
%F DAN_1994_337_3_a4