@techreport{weko_32180_1,
   author	 = "渋谷,哲朗",
   title	 = "A*アルゴリズムを用いたn × m最短路問題の効率的解法",
   year 	 = "1998",
   institution	 = "日本アイ・ビー・エム（株）東京基礎研究所",
   number	 = "41(1998-AL-062)",
   month	 = "may"
}