TY  - JOUR
AU  - Salvatore Marano
TI  - Classical solutions of hyperbolic partial differential equations with implicit mixed derivative
JO  - Annales Polonici Mathematici
PY  - 1991
SP  - 163
EP  - 178
VL  - 56
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap-56-2-163-178/
DO  - 10.4064/ap-56-2-163-178
LA  - en
ID  - 10_4064_ap_56_2_163_178
ER  -