@article{CMUC_1968_9_2_a4,
     author = {Frol{\'\i}k, Zden\v{e}k},
     title = {On the {Souslin-graph} theorem},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {243--249},
     year = {1968},
     volume = {9},
     number = {2},
     mrnumber = {0236647},
     zbl = {0165.14902},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1968_9_2_a4/}
}