TY  - JOUR
AU  - A. Raouf Chouikha
TI  - Monotonicity of the period function for some planar
differential systems.
Part II: Liénard and related systems
JO  - Applicationes Mathematicae
PY  - 2005
SP  - 405
EP  - 424
VL  - 32
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/am32-4-4/
DO  - 10.4064/am32-4-4
LA  - en
ID  - 10_4064_am32_4_4
ER  -