@article{CF04,
   author    = {Ji\v{r}\'{\i} Fiala and Massimiliano Caramia},
   title     = {New lower bounds on the weighted chromatic number of a graph},
   journal   = {Discussiones Mathematicae Graph Theory},
   year      = {2004},
   volume    = {24},
   number    = {2},
   pages     = {183--195},
}