@article{10_4064_cm_8_1_55_66,
     author = {Edward Marczewski and T. Traczyk},
     title = {On developable sets and almost-limit points},
     journal = {Colloquium Mathematicum},
     pages = {55--66},
     publisher = {mathdoc},
     volume = {8},
     number = {1},
     year = {1961},
     doi = {10.4064/cm-8-1-55-66},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-8-1-55-66/}
}