@article{10_4064_fm_102_3_229_234,
     author = {Eric van Douwen and Teodor Przymusi\'nski},
     title = {First countable and countable spaces all compactifications of which contain {\ensuremath{\beta}N}},
     journal = {Fundamenta Mathematicae},
     pages = {229--234},
     publisher = {mathdoc},
     volume = {102},
     number = {3},
     year = {1979},
     doi = {10.4064/fm-102-3-229-234},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-102-3-229-234/}
}