@article{PIM_1984_N_S_35_49_a12,
     author = {Muharem Berisha},
     title = {Neobhodimye {Usloviya} {Koefficientov} {Fur'e} {Periodicheskih} {Funkcij,} {Prinadlezhashchih} {B(p,theta,k,alpha)-klassam} {Tipa} {Besova}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {87 },
     publisher = {mathdoc},
     volume = {_N_S_35},
     number = {49},
     year = {1984},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1984_N_S_35_49_a12/}
}