TY  - JOUR
AU  - I. I. Pleshkan
TI  - Questions of the isochronism of systems with discontinuous right hand sides
JO  - Differencialʹnye uravneniâ
PY  - 1974
SP  - 822
EP  - 837
VL  - 10
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1974_10_5_a7/
LA  - ru
ID  - DE_1974_10_5_a7
ER  -