Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MAN_1970__189_162063, author = {B. HALPERN}, title = {Fixed {Point} {Theorems} for {Set-Valued} {Maps} in {Infinite} {Dimensional} {Spaces.}}, journal = {Mathematische Annalen}, pages = {87--98}, publisher = {mathdoc}, volume = {189}, year = {1970}, zbl = {0191.14701}, url = {http://geodesic.mathdoc.fr/item/MAN_1970__189_162063/} }
B. HALPERN. Fixed Point Theorems for Set-Valued Maps in Infinite Dimensional Spaces.. Mathematische Annalen, Tome 189 (1970), pp. 87-98. http://geodesic.mathdoc.fr/item/MAN_1970__189_162063/