7Choi A, Cheng C H, Ko Y L. Word extraction from Chinese documents by occurrence counts [ A].1988 International Conference on Computer Processing of Chinese and Oriental Languages, Toronto,Canada: 488 - 491.
8Fan C K, Tsai W H. Automatic word identification in Chinese sentences by the relaxation technique[J]. Computer Processing of Chinese and Oriental Languages, 1988, 4(1):33-56.
9RONLD R.Adi shamir and leonard adleman:A method for obtaining digital signatures and public-key cryptosystems[J].Communications of ACM,1978,21(2):120-126.