%0 Journal Article %A V. S. Pilidi %T A~priori estimates for bisingular operators with continuous coefficients %J Matematičeskie zametki %D 1991 %P 105-109 %V 49 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1991_49_4_a12/ %G ru %F MZM_1991_49_4_a12