Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1980_251_1_a14, author = {V. A. Yudin}, title = {Diophantine approximations in $L_2$ extremal problems}, journal = {Doklady Akademii Nauk}, pages = {54--57}, publisher = {mathdoc}, volume = {251}, number = {1}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1980_251_1_a14/} }
V. A. Yudin. Diophantine approximations in $L_2$ extremal problems. Doklady Akademii Nauk, Tome 251 (1980) no. 1, pp. 54-57. http://geodesic.mathdoc.fr/item/DAN_1980_251_1_a14/