@article{ARM_1984_20_3_a3,
     author = {Nov\'ak, V{\'\i}t\v{e}zslav},
     title = {Operations on cyclically ordered sets},
     journal = {Archivum mathematicum},
     pages = {133--139},
     year = {1984},
     volume = {20},
     number = {3},
     mrnumber = {784864},
     zbl = {0567.06002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1984_20_3_a3/}
}