TY - JOUR AU - Boonpok, Chawalit TI - $\partial$-closed sets in biclosure spaces JO - Communications in Mathematics PY - 2009 SP - 51 EP - 66 VL - 17 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/COMIM_2009__17_1_a5/ LA - en ID - COMIM_2009__17_1_a5 ER -