@article{CMUC_1985_26_2_a12,
     author = {Voss, Heinz-J\"urgen},
     title = {Note on a paper of {McMorris} and {Shier}},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {319--322},
     year = {1985},
     volume = {26},
     number = {2},
     mrnumber = {803929},
     zbl = {0569.05047},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1985_26_2_a12/}
}