@techreport{weko_177691_1,
   author	 = "尾形,直哉 and 早野,真史 and 菅原,俊治",
   title	 = "値引き戦略を考慮した発注戦略の分析）",
   year 	 = "2017",
   institution	 = "早稲田大学, 早稲田大学, 早稲田大学",
   number	 = "5",
   month	 = "feb"
}