TY  - JOUR
AU  - Christian C. Fenske
TI  - An index for periodic orbits of functional differential equations.
JO  - Mathematische Annalen
PY  - 1989
SP  - 381
EP  - 392
VL  - 285
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MAN_1989__285_1_164607/
ID  - MAN_1989__285_1_164607
ER  -