@article{MASLO_1966_16_3_a6,
     author = {Vala, Josef},
     title = {Quadratische {Doppelverh\"altnisscharen} auf {Regelfl\"achen}},
     journal = {Mathematica slovaca},
     pages = {257--267},
     year = {1966},
     volume = {16},
     number = {3},
     mrnumber = {0211316},
     zbl = {0166.17301},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1966_16_3_a6/}
}