Overlapping Statistical Word Indexing: A New Indexing Method for Japanese Text. - Yashishi Ogawa; Toru Matsuda (SIGIR, 1997)

Optimizing Query Evaluation in n-gram Indexing. - Yasushi Ogawa; Toru Matsuda (SIGIR, 1998)

Overlapping statistical segmentation for effective indexing of Japanese text. - Yasushi Ogawa; Toru Matsuda (Inf. Process. Manag., 1999)

An efficient document retrieval method using n-gram indexing. - Yasushi Ogawa; Toru Matsuda (Syst. Comput. Jpn., 2002)