@article{MZM_1978_24_5_a7, author = {A. A. Ligun}, title = {Best quadrature formulas for certain classes of periodic functions}, journal = {Matemati\v{c}eskie zametki}, pages = {661--669}, publisher = {mathdoc}, volume = {24}, number = {5}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1978_24_5_a7/} }