@article{05052199,
title = {Fixed points of the contractive or expansive type for multivalued mappings: toward a unified approach.},
journal = {Revista Colombiana de Matem\'aticas},
volume = {38},
year = {2004},
pages = {35-52},
zbl = {1104.54019},
language = {en},
url = {http://dml.mathdoc.fr/item/05052199}
}
Rodríguez-Montez, Jaime. Fixed points of the contractive or expansive type for multivalued mappings: toward a unified approach.. Revista Colombiana de Matemáticas, Tome 38 (2004) pp. 35-52. http://gdmltest.u-ga.fr/item/05052199/