TY - JOUR AU - A. P. Kombarov TI - Tightness of paracompact $k$-spaces and countable paracompactness of $F_\sigma$-sets in products JO - Vestnik Moskovskogo universiteta. Matematika, mehanika PY - 1990 SP - 87 EP - 89 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VMUMM_1990_3_a18/ LA - ru ID - VMUMM_1990_3_a18 ER -