6Susanne DeRisi,Rebecca Kennison,Nick Twyman.The What and Whys of DOIs.http://biology.plosjournals.org/perlserv/?request=get-document&doi=10.1371/journal.pbio.0000057,2005.10.22
1Sam X. Sun, Larry Lannom. Handle System Overview. September2002. Intemet Draft.
2Sam X. Sun, Sean ReiUy. Handle System Namespace and Service Definition. November 2002. Intemet Draft.
3D. Crocker, Ed. , P. OvereU. Augmented BNF for Syntax Specifications: ABNF. RFC 2234.
4F. Yergeau. UTF -8, A Transform Format for Unicode and ISO10646.RFC2044. October 1996.
5T. Bemers-Lee, L. Masinter, M. McCahiU, et al. Uniform Resource Locators (URL). RFC1738.
6Sam Sun, Sean Reilly, Larry Lannom, Jason Petrone. Handle System Protocol (ver 2.1 ) Specification. Intemet Engineering Task Force(IETF) Request for Comments (RFC). RFC 3652. November 2003.
7Carl Lagoze,Herbert Van de sompel. The Open Archives Initiative Protocol for Metadata Harvesting. February 21, 2003, http:// www. openarchives. org/OAI/openarchivesprotocol. htm (Accessed Jul. 14,2003)
8Kurt Maly, Mohammad Zubair. Xiaoming Liu. Kepler-An OAI Data/Service Provider for the Individual. April. 2001. http:// www. dlib. org/dlib/april01/maly/04maly. html (Accessed Aug. 1,2003)
9David A. Wiley, Utah State University. Connecting learning objects to instructional design theory: A definition, a metaphor, and a taxonomy[DB/OL]. Available: http://www. reusability.org/read/chapters/wiley. doc. 2002-4-4.