TY  - JOUR
AU  - S. Yu. Pilyugin
TI  - Simple connectedness with preservation of the phase diagram
JO  - Differencialʹnye uravneniâ
PY  - 1979
SP  - 408
EP  - 416
VL  - 15
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1979_15_3_a4/
LA  - ru
ID  - DE_1979_15_3_a4
ER  -