@article{AUCMP_1993_34_2_a11,
     author = {Kulpa, W.},
     title = {The indexed open covering theorem},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {75--82},
     year = {1993},
     volume = {34},
     number = {2},
     mrnumber = {1282970},
     zbl = {0804.54012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUCMP_1993_34_2_a11/}
}