@article{CMJ_2004_54_2_a11,
     author = {Poon, Kin-Keung},
     title = {On {Harpers{\textquoteright}} result concerning the bandwidths of graphs},
     journal = {Czechoslovak Mathematical Journal},
     pages = {401--405},
     year = {2004},
     volume = {54},
     number = {2},
     mrnumber = {2059260},
     zbl = {1080.05530},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2004_54_2_a11/}
}