TY  - JOUR
AU  - Drábek, Pavel
TI  - Remarks on multiple periodic solutions of nonlinear ordinary differential equations
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 1980
SP  - 155
EP  - 160
VL  - 21
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMUC_1980__21_1_a11/
LA  - en
ID  - CMUC_1980__21_1_a11
ER  -