@article{AUPO_2005_44_1_a1,
     author = {Chajda, Ivan},
     title = {A groupoid characterization of orthomodular lattices},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {13--18},
     year = {2005},
     volume = {44},
     number = {1},
     mrnumber = {2218563},
     zbl = {1091.06006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_2005_44_1_a1/}
}