TY  - JOUR
AU  - I. N. Sergeev
TI  - Oscillation, rotatability, and wandering characteristic indicators for differential systems determining rotations of plane
JO  - Vestnik Moskovskogo universiteta. Matematika, mehanika
PY  - 2019
SP  - 21
EP  - 26
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/VMUMM_2019_1_a3/
LA  - ru
ID  - VMUMM_2019_1_a3
ER  -