TY  - JOUR
AU  - Zubelevic, Oleg
TI  - On Periodic Solutions to Constrained Lagrangian System
JO  - Canadian mathematical bulletin
PY  - 2020
SP  - 242
EP  - 255
VL  - 63
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/S0008439519000456/
DO  - 10.4153/S0008439519000456
ID  - 10_4153_S0008439519000456
ER  -