@article{MASLO_1971__21_4_a5,
     author = {Hrmov\'a, Ren\'ata},
     title = {Partial groupoids with some associativity conditions},
     journal = {Mathematica slovaca},
     pages = {285--311},
     publisher = {mathdoc},
     volume = {21},
     number = {4},
     year = {1971},
     mrnumber = {0302787},
     zbl = {0249.20037},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1971__21_4_a5/}
}