@article{ARM_1986_22_3_a1,
     author = {Nov\'ak, V{\'\i}t\v{e}zslav},
     title = {Universal cyclic relations},
     journal = {Archivum mathematicum},
     pages = {125--128},
     year = {1986},
     volume = {22},
     number = {3},
     mrnumber = {868126},
     zbl = {0616.08004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1986_22_3_a1/}
}