1. Libraries demonstrate low adherence to virtual reference service guidelines;Cogo;Evidence Based Lib. Inf. Pract.,2009
2. Virtual reference service quality: critical components for adults and the net-generation;Connaway;Libri: Int. J. Lib. Inf. Serv.,2010
3. Connaway, L.S., Radford, M.L., 2011. Seeking Synchronicity: Revelations and Recommendations for Virtual Reference [PDF]. Retrieved from: http://www.oclc.org/content/dam/oclc/reports/synchronicity/full.pdf.
4. Dorris, C.S., Malloy, M., Wallace, M., 2009. Trendspotting: Analyzing Digital Reference Services on Health Sciences Libraries' Websites [PDF]. Retrieved from: http://dml.georgetown.edu/resources/resource_files/Trendspotting.pdf.
5. IFLA Reference and Information Services Section, 2008. IFLA Digital Reference Guidelines [White paper]. Retrieved September 1, 2013, from IFLA Digital Reference Guidelines website: http://IFLAdigitalreferenceguidelines.