TY - JOUR AU - H. KoĊ‚akowski TI - Non-coercive mixed problem JO - Commentationes Mathematicae PY - 1975 SP - 189 EP - 192 VL - 18 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.14708/cm.v18i2.5821/ DO - 10.14708/cm.v18i2.5821 LA - pl ID - 10_14708_cm_v18i2_5821 ER -