TY - JOUR AU - Klaas Pieter Hart TI - Spaces for which the diagonal has a closed neighborhood base JO - Colloquium Mathematicum PY - 1987 SP - 49 EP - 56 VL - 53 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm-53-1-49-56/ DO - 10.4064/cm-53-1-49-56 LA - en ID - 10_4064_cm_53_1_49_56 ER -