TY  - JOUR
AU  - Yu. V. Pokornyi
AU  - O. M. Penkin
TI  - Comparison theorems for equations on graphs
JO  - Differencialʹnye uravneniâ
PY  - 1989
SP  - 1141
EP  - 1150
VL  - 25
IS  - 7
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1989_25_7_a5/
LA  - ru
ID  - DE_1989_25_7_a5
ER  -