TY - JOUR AU - W. Pawelski TI - On a case of mixed inequalities between solutions of first order partial differential equations JO - Annales Polonici Mathematici PY - 1968 SP - 95 EP - 102 VL - 20 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/ap-20-2-95-102/ DO - 10.4064/ap-20-2-95-102 LA - en ID - 10_4064_ap_20_2_95_102 ER -