Voir la notice de l'article provenant de la source Math-Net.Ru
@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/} }
B. N. Sadovskii. A fixed-point principle. Funkcionalʹnyj analiz i ego priloženiâ, Tome 1 (1967) no. 2, pp. 74-76. http://geodesic.mathdoc.fr/item/FAA_1967_1_2_a5/