@article{DAN_1965_162_2_a3,
     author = {M. A. Krasnosel'skii and V. S. Klimov and E. A. Livshitz},
     title = {Convergence of positive functional and operators},
     journal = {Doklady Akademii Nauk},
     pages = {258--261},
     publisher = {mathdoc},
     volume = {162},
     number = {2},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_162_2_a3/}
}