TY  - JOUR
AU  - Zubelevich, Oleg
TI  - Periodic solutions to Lagrangian system
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 2018
SP  - 241
EP  - 251
VL  - 59
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.14712/1213-7243.2015.243/
DO  - 10.14712/1213-7243.2015.243
LA  - en
ID  - 10_14712_1213_7243_2015_243
ER  -