Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1961_141_6_a0, author = {Yu. A. Brudnyi and I. E. Gopengauz}, title = {Approximation by piecewise polynomial functions}, journal = {Doklady Akademii Nauk}, pages = {1283--1286}, publisher = {mathdoc}, volume = {141}, number = {6}, year = {1961}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1961_141_6_a0/} }
Yu. A. Brudnyi; I. E. Gopengauz. Approximation by piecewise polynomial functions. Doklady Akademii Nauk, Tome 141 (1961) no. 6, pp. 1283-1286. http://geodesic.mathdoc.fr/item/DAN_1961_141_6_a0/