%0 Journal Article
%A T. Sh. Kal'menov
%T The spectrum of the Tricomi problem for a fourth-order equation of mixed type
%J Differencialʹnye uravneniâ
%D 1979
%P 354-356
%V 15
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1979_15_2_a21/
%G ru
%F DE_1979_15_2_a21