@article{10_4064_cm_27_1_57_61,
     author = {A. B{\l}aszczyk},
     title = {On maps which are perfect with respect to the {Hewitt} realcompact extension},
     journal = {Colloquium Mathematicum},
     pages = {57--61},
     publisher = {mathdoc},
     volume = {27},
     number = {1},
     year = {1973},
     doi = {10.4064/cm-27-1-57-61},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-27-1-57-61/}
}