TY - JOUR AU - J. Ewert TI - Semi-closure and related topics in Hashimoto topologies JO - Commentationes Mathematicae PY - 1989 SP - 51 EP - 55 VL - 29 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.14708/cm.v29i1.6254/ DO - 10.14708/cm.v29i1.6254 LA - pl ID - 10_14708_cm_v29i1_6254 ER -