%0 Journal Article %A S. V. Efimov %T On the index of a bisingular operator with an involutive shift %J Vladikavkazskij matematičeskij žurnal %D 2024 %P 66-77 %V 26 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMJ_2024_26_4_a5/ %G ru %F VMJ_2024_26_4_a5