@article{VMUMM_2006_2_a1,
     author = {T. O. Banakh and V. V. Fedorchuk},
     title = {Hereditary subnormality of some spaces},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {8--13},
     year = {2006},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2006_2_a1/}
}