TY  - JOUR
AU  - Leis, Christian
TI  - Hopf-bifurcation in systems with spherical symmetry. I: Invariant tori
JO  - Documenta mathematica
PY  - 1997
SP  - 61
EP  - 113
VL  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DOCMA_1997__2__a11/
LA  - en
ID  - DOCMA_1997__2__a11
ER  -