TY  - JOUR
AU  - Helga Schirmer
TI  - An index and a Nielsen number for n-valued multifunctions
JO  - Fundamenta Mathematicae
PY  - 1984
SP  - 207
EP  - 219
VL  - 124
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-124-3-207-219/
DO  - 10.4064/fm-124-3-207-219
LA  - en
ID  - 10_4064_fm_124_3_207_219
ER  -