@article{SM_1981_38_2_a4,
     author = {G. A. Fomin},
     title = {On convergence in the mean of {Fourier} series},
     journal = {Sbornik. Mathematics},
     pages = {231--244},
     year = {1981},
     volume = {38},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1981_38_2_a4/}
}