%0 Journal Article %A V. K. Dzyadyk %T On best approximation in classes of periodic functions defined by integrals of a~linear combination of absolutely monotonic kernels %J Matematičeskie zametki %D 1974 %P 691-701 %V 16 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1974_16_5_a1/ %G ru %F MZM_1974_16_5_a1