@article{CMUC_1998__39_3_a5,
     author = {Zaytsev, Oleg},
     title = {On closure of the pre-images of families of mappings},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {491--501},
     publisher = {mathdoc},
     volume = {39},
     number = {3},
     year = {1998},
     mrnumber = {1666766},
     zbl = {0969.49004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1998__39_3_a5/}
}