@article{weko_59900_1,
   author	 = "Kohei,Noshita",
   title	 = "On Proving the Complexity of a Certain Graph-Colouring Problem",
   journal	 = "Journal of Information Processing ",
   year 	 = "1984",
   volume	 = "7",
   number	 = "2",
   pages	 = "106--110",
   month	 = "jul"
}