Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1965_161_6_a6, author = {Yu. I. Lyubich}, title = {General theorems on quadratic relaxation}, journal = {Doklady Akademii Nauk}, pages = {1274--1277}, publisher = {mathdoc}, volume = {161}, number = {6}, year = {1965}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1965_161_6_a6/} }
Yu. I. Lyubich. General theorems on quadratic relaxation. Doklady Akademii Nauk, Tome 161 (1965) no. 6, pp. 1274-1277. http://geodesic.mathdoc.fr/item/DAN_1965_161_6_a6/