Voir la notice de l'article provenant de la source Math-Net.Ru
@article{TRSPY_1987_180_a15, author = {V. A. Baskakov}, title = {On approximation of the classes $C(\varepsilon)$ by linear polynomial operators}, journal = {Informatics and Automation}, pages = {41--43}, publisher = {mathdoc}, volume = {180}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a15/} }
V. A. Baskakov. On approximation of the classes $C(\varepsilon)$ by linear polynomial operators. Informatics and Automation, Theory of functions and related questions of analysis, Tome 180 (1987), pp. 41-43. http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a15/