@article{FAA_1984_18_3_a14,
     author = {M. A. Krasnosel'skii and E. A. Lifshits},
     title = {Sharp linear operators},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {82--83},
     publisher = {mathdoc},
     volume = {18},
     number = {3},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1984_18_3_a14/}
}