Multi-valued contraction mappings in metric spaces.
Aequationes mathematicae, Tome 16 (1977), pp. 297-302
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@article{AM2_1977__16_136701,
author = {Stefan Czerwik},
title = {Multi-valued contraction mappings in metric spaces.},
journal = {Aequationes mathematicae},
pages = {297--302},
publisher = {mathdoc},
volume = {16},
year = {1977},
zbl = {0385.54027},
url = {http://geodesic.mathdoc.fr/item/AM2_1977__16_136701/}
}
Stefan Czerwik. Multi-valued contraction mappings in metric spaces.. Aequationes mathematicae, Tome 16 (1977), pp. 297-302. http://geodesic.mathdoc.fr/item/AM2_1977__16_136701/