@article{weko_11334_1,
   author	 = "梶,博行 and 森本,康嗣 and 相薗,敏子",
   title	 = "テキストコーパスからのトピック階層の抽出",
   journal	 = "情報処理学会論文誌",
   year 	 = "2003",
   volume	 = "44",
   number	 = "2",
   pages	 = "405--420",
   month	 = "feb"
}