%0 Journal Article
%A V. V. Ditkin
%T On the root subspaces of a two-parameter spectral problem
%J Doklady Akademii Nauk
%D 1992
%P 20-23
%V 324
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1992_324_1_a2/
%G ru
%F DAN_1992_324_1_a2