TY  - JOUR
AU  - C. Ionesco Tulcea
TI  - On the Approximation of Hausdorff Upper Semi-Continuous Correspondences.
JO  - Mathematische Zeitschrift
PY  - 1988
SP  - 207
EP  - 220
VL  - 198
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1988__198_3_173921/
ID  - MZ_1988__198_3_173921
ER  -