Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1960_131_5_a10, author = {S. A. Smolyak}, title = {Interpolation and quadrature formulas for the classes $W_s^\alpha$ and $E_s^\alpha$}, journal = {Doklady Akademii Nauk}, pages = {1028--1031}, publisher = {mathdoc}, volume = {131}, number = {5}, year = {1960}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1960_131_5_a10/} }
S. A. Smolyak. Interpolation and quadrature formulas for the classes $W_s^\alpha$ and $E_s^\alpha$. Doklady Akademii Nauk, Tome 131 (1960) no. 5, pp. 1028-1031. http://geodesic.mathdoc.fr/item/DAN_1960_131_5_a10/