@article{MASLO_1970_20_1_a1,
     author = {Vala, Josef},
     title = {\"Uber die involutorischen {Paare} der {Regelfl\"achen}},
     journal = {Mathematica slovaca},
     pages = {11--26},
     year = {1970},
     volume = {20},
     number = {1},
     mrnumber = {0301649},
     zbl = {0193.21802},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1970_20_1_a1/}
}