5[2]Coffman, Steve. We'll Take It from Here: Developments We'd Like to See in Virtual Reference Software. http: //www. lita．org/ital/2003 coffman．html，2001．9．15
6[3]Collaborative Digital Reference Service pilot project Surpasses 100 participants．OCLC Newsletter，2001(July/August):12
7Janes, Joseph, 2002, Digital reference: Reference librarians' experiences and attitudes,in JASIS,53(7).
8Francoeur, Stephen, The Teaching Librarian. Retrieved on November 2nd , 2002.
9Miwa, Makiko, User Situations in Digital Reference Service: An Evaluation of the AskERIC Q&A Service, in VRD2000 Proceedings. Retrieved on April 20th ,2002, at http://www. vrd. org/conferences/VRD2000/proceedings/shostackweb files/slide0003. htm
10McClennen, Michael and Memmot, Patricia, Roles in Digital Reference, Information Technology and Libraries, 20(3). Retrieved on April 20,2002, at http://www. lita.org/ital/2003 mcelennan. html
