@article{CMUC_1973_14_2_a5,
     author = {Hansen, Donald Joseph},
     title = {Compatible partial orderings in {Boolean} algebras},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {231--239},
     year = {1973},
     volume = {14},
     number = {2},
     mrnumber = {0327601},
     zbl = {0265.06012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1973_14_2_a5/}
}