A Differential LSI Method for Document Classification Liang Chen author Naoyuki Tokuda author Akira Nagai author 2003-07 text Proceedings of the Sixth International Workshop on Information Retrieval with Asian Languages Association for Computational Linguistics Sapporo, Japan conference publication chen-etal-2003-differential 10.3115/1118935.1118939 https://aclanthology.org/W03-1104/ 2003-07 25 32