Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1968_4_a7, author = {G. S. Kocharyan}, title = {Approximation in the mean on closed curves}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {48--53}, publisher = {mathdoc}, number = {4}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1968_4_a7/} }
G. S. Kocharyan. Approximation in the mean on closed curves. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 4 (1968), pp. 48-53. http://geodesic.mathdoc.fr/item/IVM_1968_4_a7/