@article{bwmeta1.element.bwnjournal-article-fmv112i1p13bwm,
author = {Brian Fisher},
title = {Set-valued mappings on metric spaces},
journal = {Fundamenta Mathematicae},
volume = {112},
year = {1981},
pages = {141-145},
zbl = {0456.54009},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv112i1p13bwm}
}
Fisher, Brian. Set-valued mappings on metric spaces. Fundamenta Mathematicae, Tome 112 (1981) pp. 141-145. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv112i1p13bwm/