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@article{DAN_1973_212_2_a9, author = {A. V. Sobolev}, title = {A certain class of positive linear operators in topological linear spaces}, journal = {Doklady Akademii Nauk}, pages = {305--307}, publisher = {mathdoc}, volume = {212}, number = {2}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1973_212_2_a9/} }
A. V. Sobolev. A certain class of positive linear operators in topological linear spaces. Doklady Akademii Nauk, Tome 212 (1973) no. 2, pp. 305-307. http://geodesic.mathdoc.fr/item/DAN_1973_212_2_a9/