TY  - JOUR
AU  - V. G. Bardakov
TI  - The classification of differential equations with two independent variables on the basis of the principal part
JO  - Differencialʹnye uravneniâ
PY  - 2000
SP  - 187
EP  - 197
VL  - 36
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_2000_36_2_a6/
LA  - ru
ID  - DE_2000_36_2_a6
ER  -