Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1960_132_2_a0, author = {K. I. Babenko}, title = {Approximation of periodic functions of many variables by trigonometric polynomials}, journal = {Doklady Akademii Nauk}, pages = {247--250}, publisher = {mathdoc}, volume = {132}, number = {2}, year = {1960}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1960_132_2_a0/} }
K. I. Babenko. Approximation of periodic functions of many variables by trigonometric polynomials. Doklady Akademii Nauk, Tome 132 (1960) no. 2, pp. 247-250. http://geodesic.mathdoc.fr/item/DAN_1960_132_2_a0/