Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1969_10_a1, author = {V. A. Baskakov}, title = {Certain positive linear operators}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {11--20}, publisher = {mathdoc}, number = {10}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1969_10_a1/} }
V. A. Baskakov. Certain positive linear operators. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 10 (1969), pp. 11-20. http://geodesic.mathdoc.fr/item/IVM_1969_10_a1/