TY  - JOUR
AU  - I. P. Karklin'
AU  - L. É. Reiziņš
TI  - The topological equivalence of systems of total differential equations in neighborhoods of closed trajectories
JO  - Differencialʹnye uravneniâ
PY  - 1967
SP  - 1495
EP  - 1507
VL  - 3
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1967_3_9_a8/
LA  - ru
ID  - DE_1967_3_9_a8
ER  -