@article{CMUC_2000_41_4_a18,
     author = {Porst, Hans-E.},
     title = {Hu's {Primal} {Algebra} {Theorem} revisited},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {855--859},
     year = {2000},
     volume = {41},
     number = {4},
     mrnumber = {1800177},
     zbl = {1048.08003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_2000_41_4_a18/}
}