Abels, E. G. The E-mail reference interview. // RQ 35, 3(1996), 345-358. Ammentorp, Steen; Marianne Hummelshoj. Ask a librarian : web-based reference question services : a model for development. // Paper presented at the 11th Nordic Conference on Information and Documentation, Reykjavik, Iceland, May 30 - June 1, 2001. http://www.bokis.is/iod2001/papers/Ammentorp_paper.doc (2003-07-21) Co-East: Ask a Librarian Service. Manual for participating libraries. http://www.ask-a-librarian.org.uk/manual.pdf (2003-07-21) Dervin, B.; P. Dewdney. Neutral questioning : a new approach to the reference interview. // RQ 4, 25(1986), 506-513. Francoeur, Stephen. Digital reference. http://pages.prodigy.net/tabo1/digref.htm (2003-07-21) Horn, Judy. The future is now : reference service for the electronic era. // Crossing the divide: proceedings of the Tenth National Conference of the Association of College and Research Libraries, March 15-18, 2001, Denver, Colorado. Chicago : Association of College and Research Libraries, 2001. http://www.ala.org/Content/NavigationMenu/ACRL/Events_and_Conferences/horn.pdf (2003-07-11) Katz, W. A. Introduction to reference work. Vol. II: Reference services and reference processes. 7th ed. New York : McGraw-Hill Book Company, 1997. King, G. B. Open and closed questions - the reference interview. // RQ 2, 12(1972), 157-160. Ormes, Sarah. Public libraries corner : ask a librarian. // Ariadne 3, 13(1998). http://www.ariadne.ac.uk/issue13/public-libraries/ (2003-07-21) Rothstein, Samuel. Reference service : the new dimension in librarianship. // College and research libraries 22, 1(1961), 11-18. Sečić, Dora. Informacijska služba u knjižnici. Rijeka : Benja, 1995. Taylor, R. S. Question-negotiation and information seeking in libraries. // College and research libraries 29, 3(1968), 178-194.