@techreport{weko_30421_1,
   author	 = "大黒毅",
   title	 = "組み合わせ最小化問題の近似解決の困難さについて：最大化問題との対比から",
   year 	 = "1995",
   institution	 = "NTT CS研小山グループ",
   number	 = "26(1994-PRO-021)",
   month	 = "mar"
}