@article{weko_81780_1,
   author	 = "Chuzo,Iwamoto and Junichi,Kishi and Kenichi,Morita",
   title	 = "Lower Bound of Face Guards of Polyhedral Terrains",
   journal	 = "情報処理学会論文誌",
   year 	 = "2012",
   volume	 = "53",
   number	 = "4",
   month	 = "apr"
}