%0 Journal Article
%A M. A. Mustafin
%T The Riesz basis of the Bitsadze--Samarski{\v\i} spectral problem with infinitely multiple eigenvalues
%J Differencialʹnye uravneniâ
%D 1989
%P 172-174
%V 25
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1989_25_1_a22/
%G ru
%F DE_1989_25_1_a22