Ask A Librarian: Ask Live! (2003) Web page. URL: http://www.ask-a-librarian/Patron. 

Berube, L. (2003) Digital Reference Overview. URL: http://www.ukoln.ac.uk/public/nsptg/virtual/ 

Brady, A. (2002) User-Centered Virtual Reference (Source: Harriet Shalat, Supervising Librarian, Telephone Reference Service, Director, Ask Librarians Online), the IFLA Section on Reference Work, IFLA Glasgow. 

Department of Media, Culture and Sport (2003) Framework for the Future: Libraries, Learning and Information in the Next Decade. URL: http://www.culture.gov.uk/global/publications/archive_2003/framework_future.htm 
See also http://www.resource.gov.uk/action/framework/framework.asp. 

Gross, M. et al. (2001) Assessing Quality in Digital Reference Services: Overview of Key Literature on Digital Reference. URL: http://quartz.syr.edu/quality/VRDphaseIILitReviw.pdf. 

Keystone Library Network (2003) Virtual Information Desk. URL: http://vid.sshe.edu 

LSSI (2003) Servicios de referencia en espanol. URL: http://www.vrtoolkit.net/infofiesta.htm 

McClure, C. and Lankes, R. (2001) Assessing Quality in Digital Reference Services: A Research Prospectus. URL: http://quartz.syr.edu/quality/Overview.htm. 

Ormes, S. (1998) Public Librarians Corner: Ask A Librarian. URL: http://www.ariadne.ac.uk/issue13/public-libraries/ 

Payne, G. and Perrot, M. (2003), Librarians On Call: an instant messaging enquiry service for Open University distance learners 27(85), 11-21. 

Tutor.com. (2003) URL: http://www.tutor.com. 

Woodhouse, S. (1998) Delivering the New Public Library: the role of the EARL Consortium, INFOCUS 3(1). URL: http://www.lboro.ac.uk/departments/ls/cti/EARL.html