@article{CMJ_1999__49_2_a13,
     author = {Cho, Jung R. and Je\v{z}ek, Jaroslav and Kepka, Tom\'a\v{s}},
     title = {Simple paramedial groupoids},
     journal = {Czechoslovak Mathematical Journal},
     pages = {391--399},
     publisher = {mathdoc},
     volume = {49},
     number = {2},
     year = {1999},
     mrnumber = {1692520},
     zbl = {0955.20044},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_1999__49_2_a13/}
}