@article{DAN_1979_249_1_a10,
     author = {K. I. Oskolkov},
     title = {On the optimality of the quadrature formula with equidistant nodes on classes of periodic functions},
     journal = {Doklady Akademii Nauk},
     pages = {49--52},
     publisher = {mathdoc},
     volume = {249},
     number = {1},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1979_249_1_a10/}
}