TY  - JOUR
AU  - Marzantowicz, Wacław
AU  - Parusiński, Adam
TI  - Periodic solutions near an equilibrium of a differential equation with a first integral
JO  - Rendiconti del Seminario Matematico della Università di Padova
PY  - 1987
SP  - 193
EP  - 206
VL  - 77
PB  - Seminario Matematico of the University of Padua
UR  - http://archive.numdam.org/item/RSMUP_1987__77__193_0/
LA  - en
ID  - RSMUP_1987__77__193_0
ER  -