TY  - JOUR
AU  - Mawhin, Jean
TI  - Contractive mappings and periodically perturbed conservative systems
JO  - Archivum mathematicum
PY  - 1976
SP  - 67
EP  - 73
VL  - 12
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ARM_1976__12_2_a1/
LA  - en
ID  - ARM_1976__12_2_a1
ER  -