@article{10_4064_fm_105_2_147_158,
     author = {Eric van Douwen and Teodor Przymusi\'nski},
     title = {Separable extensions of first countable spaces},
     journal = {Fundamenta Mathematicae},
     pages = {147--158},
     publisher = {mathdoc},
     volume = {105},
     number = {2},
     year = {1979},
     doi = {10.4064/fm-105-2-147-158},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-105-2-147-158/}
}