@article{DAN_1963_151_1_a8,
     author = {I. N. Pak},
     title = {Properties of sums of certain trigonometric series},
     journal = {Doklady Akademii Nauk},
     pages = {38--41},
     publisher = {mathdoc},
     volume = {151},
     number = {1},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_151_1_a8/}
}