@article{  
   author = {P. Baldi, E.C. Posner},
   title = {Graph Coloring Bounds for Cellular Radio.},
   journal = {Computers and Mathematics with Applications},
   volume = {19},
   number = {10},
   pages = {91-97},
   note = {},
   abstract = {},
   keywords = {},
   year = {1990}
}