TY  - JOUR
AU  - G. I. Èskin
TI  - A conjugacy problem for equations of principal type with two independent variables
JO  - Trudy Moskovskogo matematičeskogo obŝestva
PY  - 1970
SP  - 245
EP  - 292
VL  - 21
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MMO_1970_21_a6/
LA  - ru
ID  - MMO_1970_21_a6
ER  -