@article{10_4153_CJM_1971_089_1,
     author = {Bruns, G\"unter and Kalmbach, Gudrun},
     title = {Varieties of {Orthomodular} {Lattices}},
     journal = {Canadian journal of mathematics},
     pages = {802--810},
     year = {1971},
     volume = {23},
     number = {5},
     doi = {10.4153/CJM-1971-089-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1971-089-1/}
}