Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1969_2_a11, author = {A. A. Fomin}, title = {Linear methods of summation of double {Fourier} series}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {106--116}, publisher = {mathdoc}, number = {2}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1969_2_a11/} }
A. A. Fomin. Linear methods of summation of double Fourier series. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 2 (1969), pp. 106-116. http://geodesic.mathdoc.fr/item/IVM_1969_2_a11/