%0 Journal Article
%A I El Ouali
%A M Ech-Cherif El Kettani
%A M Karmouni
%T Quasi-Fredholm spectrum for operator matrices
%J Filomat
%D 2022
%P 4893 
%V 36
%N 14
%U http://geodesic.mathdoc.fr/articles/10.2298/FIL2214893E/
%R 10.2298/FIL2214893E
%G en
%F 10_2298_FIL2214893E