@article{RSMUP_1975__53__15_0, author = {Iseki, Kiyoshi}, title = {Multi-valued contraction mappings in complete metric spaces}, journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova}, volume = {54}, year = {1975}, pages = {15-19}, mrnumber = {410715}, zbl = {0328.54030}, language = {en}, url = {http://dml.mathdoc.fr/item/RSMUP_1975__53__15_0} }
Iseki, Kiyoshi. Multi-valued contraction mappings in complete metric spaces. Rendiconti del Seminario Matematico della Università di Padova, Tome 54 (1975) pp. 15-19. http://gdmltest.u-ga.fr/item/RSMUP_1975__53__15_0/
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