@article{ARM_1978__14_3_a2,
     author = {Chvalina, Jan},
     title = {Characterizations of certain monounary algebras. {II}},
     journal = {Archivum mathematicum},
     pages = {145--153},
     publisher = {mathdoc},
     volume = {14},
     number = {3},
     year = {1978},
     mrnumber = {512753},
     zbl = {0402.08006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1978__14_3_a2/}
}