1 Luhn H P.The automatic creation of literature abstracls. IBM Journal o fResearch and Development,1958,2(2):159—165
2 Edmundson H P.Problems in automatic abstracting.Communications of the ACM,1964,7(4):259—263
3 Rau L F et al Information extraction and text summarization using linguistic knowledge acquisition.Information Processing&Management,1989,25(4):419—428
4 Paice C D.Constructing literature abstracts by computer: Technigues and Prospects.Information Processing&
Management,1990,26(1):171—186
5 Morris A Hetal.The effects and limitations of automated text condensing on reading comprehension
performance.Information Systems Research,1992,3(1):17—35
6 Brandow R et al.Automatic Condensation of Electronic publications by sentence sekction.Information Processing
&Management,1995,31(5):675—685
7 Johnson F C et al.The application of linguistic processing to automatic abstract genaration.Journal of Documentation and Text Management,1.
8 Salton G&M Gill M.An introduction to modern information retrieval.New York:Mcgraw-Hill,1983