@article{weko_14122_1,
   author	 = "Chin-ChenChang and Horng-TwuLiaw",
   title	 = "Assigning Digital Keys to Determine Relationships in a User Hierarchy Structure",
   journal	 = "情報処理学会論文誌",
   year 	 = "1994",
   volume	 = "35",
   number	 = "10",
   pages	 = "2189--2196",
   month	 = "oct"
}