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@article{DAN_1970_190_1_a1, author = {A. P. Bulanov}, title = {The best rational approximations of convex functions and functions of finite variation}, journal = {Doklady Akademii Nauk}, pages = {13--14}, publisher = {mathdoc}, volume = {190}, number = {1}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1970_190_1_a1/} }
A. P. Bulanov. The best rational approximations of convex functions and functions of finite variation. Doklady Akademii Nauk, Tome 190 (1970) no. 1, pp. 13-14. http://geodesic.mathdoc.fr/item/DAN_1970_190_1_a1/