@article{AUCMP_1992__33_1_a6,
     author = {Kepka, Tom\'a\v{s} and Trch, Milan},
     title = {Groupoids and the associative law {I.} {(Associative} triples)},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {69--86},
     publisher = {mathdoc},
     volume = {33},
     number = {1},
     year = {1992},
     mrnumber = {1217782},
     zbl = {0791.20084},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/AUCMP_1992__33_1_a6/}
}