@article{MASLO_1990__40_2_a2,
     author = {Novotn\'y, Ji\v{r}{\'\i}},
     title = {On the characterization of a certain class of monounary algebras},
     journal = {Mathematica slovaca},
     pages = {123--128},
     publisher = {mathdoc},
     volume = {40},
     number = {2},
     year = {1990},
     mrnumber = {1094767},
     zbl = {0734.08003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1990__40_2_a2/}
}