@article{PORMA_1967__26_4_115044,
     author = {Worrell, J.M. jr.},
     title = {On collections of domains inscribed in a covering of a space in the sense of {Alexandroff} and {Urysohn}},
     journal = {Portugaliae mathematica},
     pages = {405--420},
     publisher = {mathdoc},
     volume = {26},
     number = {4},
     year = {1967},
     mrnumber = {0259851},
     zbl = {0189.53302},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1967__26_4_115044/}
}