@article{MASLO_1965__15_2_a2,
     author = {Vala, Josef},
     title = {Spezielle {Doppelverh\"altnisscharen} auf {Regelfl\"achen}},
     journal = {Mathematica slovaca},
     pages = {126--142},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {1965},
     mrnumber = {0217710},
     zbl = {0133.14702},
     language = {ge},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1965__15_2_a2/}
}