1. Genetic programming: an introduction––on the automatic evolution of computer programs and its applications;Banzhaf,1998
2. Bartell, B. T., Cottrell, G. W., & Belew, R. K. (1994). Automatic combination of multiple ranked retrieval systems. In The proceedings of seventeenth annual international ACM SIGIR conference on research and development in information retrieval (pp. 173–181). Available: citeseer.nj.nec.com/bartell94automatic.html
3. A smart itsy bitsy spider for the web;Chen;Journal of the American Society for Information Science,1998
4. Fan, W., Gordon, M. D., & Pathak, P. (2000). Personalization of search engine services for effective retrieval and knowledge management. In Proceedings of 2000 international conference on information systems (ICIS), Brisbane, Australia (pp. 20–34)
5. Fox, E. A. (1983). Extending the boolean and vector space models of information retrieval with p-norm queries and multiple concept types. Ph.D. thesis, Cornell University