TY  - JOUR
AU  - A. G. Kushner
TI  - Chaplygin and Keldysh normal forms of Monge--Ampere equations of variable type
JO  - Matematičeskie zametki
PY  - 1992
SP  - 63
EP  - 67
VL  - 52
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1992_52_5_a8/
LA  - ru
ID  - MZM_1992_52_5_a8
ER  -