@article{10_21136_CPMF_1930_122737,
     author = {Seifert, Ladislav},
     title = {K ot\'azce prom{\'\i}t\'an{\'\i} na jednu pr\r{u}m\v{e}tnu},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky a fysiky},
     pages = {23--D24},
     year = {1930},
     volume = {59},
     number = {2},
     doi = {10.21136/CPMF.1930.122737},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPMF.1930.122737/}
}