TY  - JOUR
AU  - Czesław Olech
TI  - Approximation of set-valued functions by continuous functions
JO  - Colloquium Mathematicum
PY  - 1968
SP  - 285
EP  - 293
VL  - 19
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm-19-2-285-293/
DO  - 10.4064/cm-19-2-285-293
LA  - en
ID  - 10_4064_cm_19_2_285_293
ER  -