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1 이태영, "한국어 초록문의 문장과 내용에 관한 연구" 21 (21): 1-33, 1990
2 "http://www.wipscorp.com/en"
3 "http://www.research.att.com/∼lewis"
4 J. A. Wise, "Visualizing the non-visual: Spatial analysis and interaction with information from text documents" 51-58, 1995
5 Y. Liu, "Visualizing Document Classification: A Search Aid for the Digital Library" 51 (51): 216-227, 2000
6 M. Song, "Visualization in Information Retrieval, A Three-Level Analysis" 26 (26): 3-19, 2000
7 T. Kohonen, "Very large twolevel SOM for the browsing of newsgroups" 1112 : 269-274, 1996
8 R. K. Maloney, "Title versus Title/Abstract Text Searching SDI System" 25 (25): 370-373, 1974
9 J. A. Wise, "The ecological approach to text visualization" 50 (50): 1224-1233, 1999
10 A. Toffler, "The Third Wave" Bantam Books 1990
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