@article{weko_82611_1,
   author	 = "Kenichiro,Nakai and Yasuhiko,Takenaga",
   title	 = "NP-Completeness of Pandemic",
   journal	 = "情報処理学会論文誌",
   year 	 = "2012",
   volume	 = "53",
   number	 = "6",
   month	 = "jun"
}