@techreport{weko_31713_1,
   author	 = "山口,大輔 and 李,国棟 and 永井,正武",
   title	 = "灰色格子演算に基づく灰色ラフ集合の提案",
   year 	 = "2006",
   institution	 = "神奈川大, 神奈川大, 神奈川大",
   number	 = "100(2006-AL-108)",
   month	 = "sep"
}