@article{VMUMM_1990_3_a18,
     author = {A. P. Kombarov},
     title = {Tightness of paracompact $k$-spaces and countable paracompactness of $F_\sigma$-sets in products},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {87--89},
     publisher = {mathdoc},
     number = {3},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1990_3_a18/}
}