@article{CMUC_1967_8_1_a9,
     author = {Hu\v{s}ek, Miroslav},
     title = {One more remark on reflections},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {129--137},
     year = {1967},
     volume = {8},
     number = {1},
     mrnumber = {0209334},
     zbl = {0178.01102},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1967_8_1_a9/}
}