@article{weko_15431_1,
   author	 = "中野,良平 and 斉藤,和巳",
   title	 = "関係論理表現に現れる集約関数の最適関係代数表現への変換法",
   journal	 = "情報処理学会論文誌",
   year 	 = "1987",
   volume	 = "28",
   number	 = "12",
   pages	 = "1246--1254",
   month	 = "dec"
}