@article{MASLO_1969__19_2_a2,
     author = {Havel, V\'aclav},
     title = {Ternary halfgroupoids and coordinatization},
     journal = {Mathematica slovaca},
     pages = {102--109},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {1969},
     mrnumber = {0301128},
     zbl = {0186.54301},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1969__19_2_a2/}
}