@article{1183529119, author = {Halpern, Benjamin}, title = {Fixed points of nonexpanding maps}, journal = {Bull. Amer. Math. Soc.}, volume = {73}, number = {6}, year = {1967}, pages = { 957-961}, language = {en}, url = {http://dml.mathdoc.fr/item/1183529119} }
Halpern, Benjamin. Fixed points of nonexpanding maps. Bull. Amer. Math. Soc., Tome 73 (1967) no. 6, pp. 957-961. http://gdmltest.u-ga.fr/item/1183529119/