@article{10_21136_CMJ_1991_102444,
     author = {Hansen, Donald Joseph},
     title = {Pseudo-complemented distributive groupoids},
     journal = {Czechoslovak Mathematical Journal},
     pages = {141--148},
     year = {1991},
     volume = {41},
     number = {1},
     doi = {10.21136/CMJ.1991.102444},
     mrnumber = {1087634},
     zbl = {0843.06007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1991.102444/}
}