@article{CMJ_2003__53_4_a0,
     author = {Cho, Jung R. and Kepka, Tom\'a\v{s}},
     title = {Infinite simple zeropotent paramedial groupoids},
     journal = {Czechoslovak Mathematical Journal},
     pages = {769--775},
     publisher = {mathdoc},
     volume = {53},
     number = {4},
     year = {2003},
     mrnumber = {2018829},
     zbl = {1080.20505},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2003__53_4_a0/}
}