%0 Journal Article %A M. K. Potapov %A F. M. Berisha %T On Jackson's theorem for the modulus of smoothness determined by a nonsymmetric generalized shift operator %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 2000 %P 7-15 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_2000_3_a1/ %G ru %F VMUMM_2000_3_a1