@article{CMUC_1964__5_3_a2,
     author = {Vop\v{e}nka, Petr and Bukovsk\'y, Lev},
     title = {The existence of a {PCA-set} of cardinal $\aleph_1$},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {125--128},
     publisher = {mathdoc},
     volume = {05},
     number = {3},
     year = {1964},
     mrnumber = {0168481},
     zbl = {0143.25902},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1964__5_3_a2/}
}