TY  - JOUR
AU  - Tadeusz Rumak
TI  - Estimation of functions by means of the first order partial differential inequalities
JO  - Annales Polonici Mathematici
PY  - 1972
SP  - 61
EP  - 71
VL  - 26
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap-26-1-61-71/
DO  - 10.4064/ap-26-1-61-71
LA  - en
ID  - 10_4064_ap_26_1_61_71
ER  -