@article{DAN_1972_206_3_a1,
     author = {L. G. Labsker},
     title = {On strong convergence of sequences of positive linear operators in {Banach} spaces},
     journal = {Doklady Akademii Nauk},
     pages = {525--528},
     publisher = {mathdoc},
     volume = {206},
     number = {3},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_206_3_a1/}
}