7Barbara A. Winters. Access and ownership in the 21st century: development of virtual collection in consortial settings. In:Ching- Chih Chen ed. Electronic Resources and Consortia.Taipei: Science and Technology Infommtion Center, 1999.
8O.Gene Norman. The impact of electronic information sources on collection development: a stagey of current practice. Library Hi Tech, 1997, 15(1-2): 123-132.
9Cynthia Dobson et al. Collection evaluation for interdisciplinary fields: a comprehensive approach. The Journal of Academic Librarianship, 1996, 22(4) : 279 - 284.
10Karen Svenningsen. An evaluation model for electronic resources utilizing cost analysis. The Bottom Line: Managing Library Finances, 1998,11(1): 18-23.