Have proposed dividing the search engine into three generations according to the ranking technology of the search engine, have recommended several kinds of main ranking technology of search engines and has analysed the development of the third generation of search engine
杨思洛. 搜索引擎的排序技术研究[J]. 现代图书情报技术, 2005, 21(1): 43-47.
Yang Siluo. Research on Ranking Technology of Search Engines. New Technology of Library and Information Service, 2005, 21(1): 43-47.