@article{CMJ_1999__49_2_a12,
     author = {Jakub{\'\i}kov\'a-Studenovsk\'a, Danica},
     title = {Retract irreducibility of monounary algebras},
     journal = {Czechoslovak Mathematical Journal},
     pages = {363--390},
     publisher = {mathdoc},
     volume = {49},
     number = {2},
     year = {1999},
     mrnumber = {1692524},
     zbl = {0953.08004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_1999__49_2_a12/}
}