@article{CMJ_2005__55_3_a15,
     author = {Bisgaard, Torben Maack and Sakakibara, Nobuhisa},
     title = {Stieltjes perfect semigroups are perfect},
     journal = {Czechoslovak Mathematical Journal},
     pages = {729--753},
     publisher = {mathdoc},
     volume = {55},
     number = {3},
     year = {2005},
     mrnumber = {2153098},
     zbl = {1081.43002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2005__55_3_a15/}
}