@article{CMUC_1994__35_4_a19,
     author = {Th\"ummel, Egbert},
     title = {The fixed point set of open mappings on extremally disconnected spaces},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {789--794},
     publisher = {mathdoc},
     volume = {35},
     number = {4},
     year = {1994},
     mrnumber = {1321249},
     zbl = {0854.54035},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1994__35_4_a19/}
}