@article{weko_92122_1,
   author	 = "Hiro,Ito",
   title	 = "Editor's Message for Special Issue on Mathematics of Puzzles",
   journal	 = "情報処理学会論文誌",
   year 	 = "2013",
   volume	 = "54",
   number	 = "5",
   month	 = "may"
}