Voir la notice de l'article provenant de la source Math-Net.Ru
@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/} }
L. G. Labsker. On strong convergence of sequences of positive linear operators in Banach spaces. Doklady Akademii Nauk, Tome 206 (1972) no. 3, pp. 525-528. http://geodesic.mathdoc.fr/item/DAN_1972_206_3_a1/