@article{CMUC_1966_7_1_a7,
     author = {Beran, Ladislav},
     title = {A note on {Chehata's} groups},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {117--121},
     year = {1966},
     volume = {7},
     number = {1},
     mrnumber = {0197544},
     zbl = {0154.27002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1966_7_1_a7/}
}