TY  - JOUR
AU  - Kozera, Ryszard
TI  - Reducing real almost-linear second-order partial differential operators in two independent variables to a canonical form
JO  - Czechoslovak Mathematical Journal
PY  - 1995
SP  - 481
EP  - 490
VL  - 45
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1995.128543/
DO  - 10.21136/CMJ.1995.128543
LA  - en
ID  - 10_21136_CMJ_1995_128543
ER  -