Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1989_46_2_a2, author = {M. Babayev}, title = {Best approximation by bilinear forms}, journal = {Matemati\v{c}eskie zametki}, pages = {21--33}, publisher = {mathdoc}, volume = {46}, number = {2}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1989_46_2_a2/} }
M. Babayev. Best approximation by bilinear forms. Matematičeskie zametki, Tome 46 (1989) no. 2, pp. 21-33. http://geodesic.mathdoc.fr/item/MZM_1989_46_2_a2/