%0 Journal Article
%A V. Budyka
%A M. Malamud
%A K. Mirzoev
%T Deficiency indices of block Jacobi matrices: survey
%J Contemporary Mathematics. Fundamental Directions
%D 2021
%P 237-254
%V 67
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMFD_2021_67_2_a2/
%G ru
%F CMFD_2021_67_2_a2