@article{AUPO_2001__40_1_a6,
     author = {Cz\'edli, G\'abor and Horv\'ath, Eszter K. and Klukovits, Lajos},
     title = {Associativity in monoids and categories},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {47--53},
     publisher = {mathdoc},
     volume = {40},
     number = {1},
     year = {2001},
     mrnumber = {1904684},
     zbl = {1038.18002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_2001__40_1_a6/}
}