9Xiaoming Liu, Kurt Maly, Michael L. Nelson. DP9: An OAI Gateway Service for Web Crawlers. JCDL' 02, Oregon,2OO2. hnp.//www.cs.odu.edu/-liu _ x/dp9/dp9.pdf.2004-04-30.
10DP9:An OAI Gateway Service for Web Crawlers.http://www. language-archives. org: 8082/dp9/about. jsp. 2004-05 -02.