@article{MASLO_1976_26_3_a0,
     author = {Hejn\'y, Milan},
     title = {Independence in {Klein} spaces},
     journal = {Mathematica slovaca},
     pages = {161--170},
     year = {1976},
     volume = {26},
     number = {3},
     mrnumber = {0422116},
     zbl = {0383.54004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1976_26_3_a0/}
}