@article{10_21136_CMJ_1963_100573,
     author = {Frol{\'\i}k, Zden\v{e}k},
     title = {On the descriptive theory of sets},
     journal = {Czechoslovak Mathematical Journal},
     pages = {335--359},
     publisher = {mathdoc},
     volume = {13},
     number = {3},
     year = {1963},
     doi = {10.21136/CMJ.1963.100573},
     mrnumber = {0162215},
     zbl = {0149.40303},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1963.100573/}
}