@article{10_4064_cm_43_1_61_67,
     author = {Andrzej Szyma\'nski},
     title = {Undecidability of the existence of regular extremally disconnected {S-spaces}},
     journal = {Colloquium Mathematicum},
     pages = {61--67},
     publisher = {mathdoc},
     volume = {43},
     number = {1},
     year = {1980},
     doi = {10.4064/cm-43-1-61-67},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-43-1-61-67/}
}