%0 Journal Article
%A E. P. Eroshenkov
%T Letter to the editors: ``The spectrum of the Bitsadze--Samarski{\v\i} problem'' [Differentsial'nye Uravneniya \textbf{19} (1983), no.~1, 

%J Differencialʹnye uravneniâ
%D 1985
%P 178
%V 21
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1985_21_1_a27/
%G ru
%F DE_1985_21_1_a27