@article{DAN_1981_257_4_a6,
     author = {V. I. Gorbachuk and M. L. Gorbachuk},
     title = {Trigonometric series and generalized periodic functions},
     journal = {Doklady Akademii Nauk},
     pages = {799--804},
     publisher = {mathdoc},
     volume = {257},
     number = {4},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_257_4_a6/}
}