@techreport{weko_32569_1,
   author	 = "徳山,豪 and 中野,淳",
   title	 = "ヒッチコック輸送問題の新算法",
   year 	 = "1991",
   institution	 = "日本IBM東京基礎研究所, 日本IBM東京基礎研究所",
   number	 = "79(1991-AL-023)",
   month	 = "sep"
}