@article{AUPO_1999__38_1_a12,
     author = {Machala, Franti\v{s}ek and Slez\'ak, Vladim{\'\i}r},
     title = {Disjoint unions of incidence structures and complete lattices},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {119--129},
     publisher = {mathdoc},
     volume = {38},
     number = {1},
     year = {1999},
     mrnumber = {1767197},
     zbl = {0974.08002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1999__38_1_a12/}
}