7McNay H E. Enterprise Content Management: an Overview. In Proc. IEEE Intl. Professional Communication Conf. ,2002:396 - 402.
8Chiu D K W, Kwok B, Wong R, et al. Alert Driven E-Services Management, In Proe. HICSS37, Jan 2004, CDROM, 10pages, and Computing Systems, Minneapolis, Minnesota ,2002 : 1 - 15.
9Erik hatcher. Otis gospondetic. Lucene in action,2005.