TY  - JOUR
AU  - P. Besala
TI  - On partial differential inequalities of the first order
JO  - Annales Polonici Mathematici
PY  - 1971
SP  - 145
EP  - 148
VL  - 25
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap-25-2-145-148/
DO  - 10.4064/ap-25-2-145-148
LA  - en
ID  - 10_4064_ap_25_2_145_148
ER  -