@article{bwmeta1.element.bwnjournal-article-cmv19i2n19,
author = {Czes\l aw Olech},
title = {Approximation of set-valued functions by continuous functions},
journal = {Colloquium Mathematicae},
volume = {19},
year = {1968},
pages = {285-293},
zbl = {0183.13603},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-cmv19i2n19}
}
Czesław Olech. Approximation of set-valued functions by continuous functions. Colloquium Mathematicae, Tome 19 (1968) pp. 285-293. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-cmv19i2n19/