@article{10_4064_cm_5_2_170_171,
     author = {Roman Sikorski},
     title = {Some examples of {Borel} sets},
     journal = {Colloquium Mathematicum},
     pages = {170--171},
     publisher = {mathdoc},
     volume = {5},
     number = {2},
     year = {1957},
     doi = {10.4064/cm-5-2-170-171},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-5-2-170-171/}
}