1. Sloan, Bernie (1998). Service perspecti-ves for the digital library remote reference services. Library Trends, 47(1). Retrieved Feb. 21 2005 from Library and Information Science Abstracts databaseBakker, Trix. (2002) Virtual reference services: connecting users with ex-perts and supporting the development of skil-ls. Liber Quarterly, 12. Retrieved Feb. 21, 2005 from http://webdoc.gwdg.de /edoc/aw/liber/ lq-2-02/124-137.pdf

2. Bakker, Trix (2002) Virtual reference ser-vices: connecting users with experts and sup-porting the development of skills. Liber Quar-terly, 12. Retrieved Feb. 21, 2005 from http:// webdoc.gwdg.de /edoc/aw/liber/lq-2-02/124-137.pdf

3. Barry, E et al (2010) Virtual Reference in UK academic libraries: The virtual enquiry project 2008–2009, Library Review, Vol. 59 (1) pp.40-55.

4. Woodhouse, S. (1998) Delivering the New Public Library: the role of the EARL Con-sortium, INFOCUS 3(1).

5. Berube, L. (2005) People’s Network En-quire: virtual reference in England, World Lib-rary and Information Congress: 71st IFLA General Conference and Council, August 14th – 18th 2005, Oslo, Norway.

6. http://www.slainte.org.uk/slic/slicin-dex.htm, QuestionPoint.org, «A national vir-tual reference service for the U.S?», http://www.nla.gov.au/askalibrarian/,