@article{05692297, title = {Schauder fixed point theorem in spaces with global nonpositive curvature.}, journal = {Fixed Point Theory and Applications [electronic only]}, volume = {2009}, year = {2009}, doi = {10.1155/2009/906727}, zbl = {1197.54071}, language = {en}, url = {http://dml.mathdoc.fr/item/05692297} }
Niculescu, Constantin P.; Rovenţa, Ionel. Schauder fixed point theorem in spaces with global nonpositive curvature.. Fixed Point Theory and Applications [electronic only], Tome 2009 (2009) . doi : 10.1155/2009/906727. http://gdmltest.u-ga.fr/item/05692297/