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@article{10_4064_ap_45_3_275_282, author = {L. Rybi\'nski}, title = {Multivalued contraction with parameter}, journal = {Annales Polonici Mathematici}, pages = {275--282}, publisher = {mathdoc}, volume = {45}, number = {3}, year = {1985}, doi = {10.4064/ap-45-3-275-282}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-45-3-275-282/} }
L. Rybiński. Multivalued contraction with parameter. Annales Polonici Mathematici, Tome 45 (1985) no. 3, pp. 275-282. doi : 10.4064/ap-45-3-275-282. http://geodesic.mathdoc.fr/articles/10.4064/ap-45-3-275-282/
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