@techreport{weko_40812_1,
   author	 = "向井,国昭",
   title	 = "情報の包摂関係の余代数モデル",
   year 	 = "1992",
   institution	 = "慶応義塾大学環境情報学部",
   number	 = "87(1992-FI-028)",
   month	 = "nov"
}