@article{RM_1968_23_2_a13,
     author = {M. A. Krasnosel'skii and E. A. Lifshits},
     title = {On the convergence of sequences of positive operators in linear topological spaces},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1968},
     volume = {23},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1968_23_2_a13/}
}