TY  - JOUR
AU  - E. C. Zachmanoglou
TI  - Solutions which are flat or Singular on Totally Characteristic Manifolds of first order Partial Differential Equations 
JO  - Μαθηματική Επιθεώρηση

PY  - 1980
SP  - 149
EP  - 158
VL  - 20
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MR_1980__20_a13/
LA  - gr
ID  - MR_1980__20_a13
ER  -