TY - JOUR AU - J. Musialek TI - Some properties of zeros of solutions of second-order linear partial differential equations of elliptic type JO - Commentationes Mathematicae PY - 1966 SP - 27 EP - 36 VL - 10 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.14708/cm.v10i1.5573/ DO - 10.14708/cm.v10i1.5573 LA - pl ID - 10_14708_cm_v10i1_5573 ER -