@article{10_21136_CMJ_1976_101414,
     author = {Kucia, Anna and Szyma\'nski, Andrzej},
     title = {Absolute points in $\beta N\setminus N$},
     journal = {Czechoslovak Mathematical Journal},
     pages = {381--387},
     publisher = {mathdoc},
     volume = {26},
     number = {3},
     year = {1976},
     doi = {10.21136/CMJ.1976.101414},
     mrnumber = {0413046},
     zbl = {0346.02038},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1976.101414/}
}