TY  - JOUR
AU  - P. Popivanov
TI  - Wave fronts of solutions of some classes of non-linear partial differential equations
JO  - Banach Center Publications
PY  - 1992
SP  - 361
EP  - 366
VL  - 27
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/-27-2-361-366/
DO  - 10.4064/-27-2-361-366
LA  - en
ID  - 10_4064__27_2_361_366
ER  -