@article{CMUC_1974__15_1_a15,
     author = {Beran, Ladislav},
     title = {Modularity in generalized orthomodular lattices},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {189--193},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1974},
     mrnumber = {0337709},
     zbl = {0285.06006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1974__15_1_a15/}
}