@article{weko_59839_1,
   author	 = "Michio,Oyamaguchi",
   title	 = "The Reachability Problem for Quasi-Ground Term Rewriting Systems",
   journal	 = "Journal of Information Processing ",
   year 	 = "1987",
   volume	 = "9",
   number	 = "4",
   pages	 = "232--236",
   month	 = "mar"
}