@article{10_4064_cm_44_1_65_76,
     author = {Roman Pol},
     title = {On category-raising and dimension-raising open mappings with discrete fibers},
     journal = {Colloquium Mathematicum},
     pages = {65--76},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {1981},
     doi = {10.4064/cm-44-1-65-76},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-44-1-65-76/}
}