4Chen C. CiteSpace II: Detecting and Visualizing Emerging Trendsand Transient Patterns in Scientific Literature [ J ]. Journal of the American Society for Information Science and Technology, 2006 (3): 359-377.
5Medjahed B, Bouguettaya A, Elmagarmid AK. The Very Large Data Bases Journal[ J]. Institute of Electrical and Electronics En- gineers, 2003,12 (4) :333-351.
6Layne K, Lee J W. Developing Fully Functional E- govern- ment: A Four Stage Model [J]. Government Information Quar- terly, 2001, 18 (2) :122-136.
7Charalabidis Y, Lampathaki F, Askounis D. Metadata Sets for E -government Resourcesz The Extended E-government Metadata Schema[ J]. Electronic Government Proceedings, 2009:341-352.
8West DM. E-government and the Transformation of Service De- livery and Citizen Attitudes[ J ]. Public Administration Review, 2004, 64( 1 ) : 15-27.
9Carter L, Bilanger F. The Utilization Of E:govemment Services: Citizen Trust, Innovation and Acceptance Factors [J]. Informa- tion Systems Journal, 2005, 15( 1 ) : 5-25.
10Moon M J. The Evolution of E-government among Municipali- ties: Rhetoric or Reality? [ J]. Public Administration Review, 2002, 62(4) : 424-433.