@article{FAA_1967_1_2_a5,
     author = {B. N. Sadovskii},
     title = {A fixed-point principle},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {74--76},
     publisher = {mathdoc},
     volume = {1},
     number = {2},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1967_1_2_a5/}
}