@article{MASLO_2006__56_1_a8,
     author = {Jakub{\'\i}kov\'a-Studenovsk\'a, Danica},
     title = {Retracts of monounary algebras corresponding to groupoids},
     journal = {Mathematica slovaca},
     pages = {105--112},
     publisher = {mathdoc},
     volume = {56},
     number = {1},
     year = {2006},
     mrnumber = {2217583},
     zbl = {1164.08304},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_2006__56_1_a8/}
}