5C. Chen. Information Visualization: Beyond the Horizon [M]. London: Springer, 2004.
6Edward M Corrado. Digital Preservation: The Next Library Frontier [J]. Igelu, 2009 (9): 13-18.
7Joel Sam,S.N.B.Tackie.Citation Analysis of Dissertations atthe Department of Information Studies,University of Ghana,Legon[J].Afr.J.Lib&Inf.Sc.,2007,17(2):123-132.