Akbari Mahalle Kalai, M. (2011). Feasibility of providing shared digital reference services in the libraries of Allameh Tabatabai University Allameh Tabatabai University]. Tehran, Iran. (In persian). from: https://ganj.irandoc.ac.ir/#/articles/cba51d2b5b5c3e632d68ed270053a2dc
Barrett, K., & Pagotto, S. (2019). Local users, consortial providers: Seeking points of dissatisfaction with a collaborative virtual reference service. Evidence Based Library and Information Practice, 14(4), 2-20. https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=Local+users%2C+consortial+providers%3A+Seeking+points+of+dissatisfaction+with+a+collaborative+virtual+reference+service.+Evidence+Based+Library+and+Information+Practice&btnG=
Brown, R. (2017). Lifting the veil: Analyzing collaborative virtual reference transcripts to demonstrate value and make recommendations for practice. Reference and User Services Quarterly, 57(1), 42-47. https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=Lifting+the+veil%3A+Analyzing+collaborative+virtual+reference+transcripts+to+demonstrate+value+and+make+recommendations+for+practice&btnG=
Comiitte, M. D. R. G. A. H. (2017). Guidelines for implementing and maintaining virtual reference services [Internet]. 2004 (Consulta: 30 de maig de 2017). from: https://www.ala.org/rusa/sites/ala.org.rusa/files/content/GuidelinesVirtualReference_2017.pdf.
Ellis, L., & Francoeur, S. (2001). Applying Information Competency to Digital Reference. 67th IFLA Council and General Conference, August 16-25. (M. Kokabi, Trans.; S. Niazi, Ed.). National Library of the Islamic Republic. https://academicworks.cuny.edu/cgi/viewcontent.cgi?article=2141&context=bb_pubs .
Forsberg, Å., & Stenson, L. (2015). Developing a virtual reference service based on team development and collaborative learning. In Taking Charge of your LIS Career: Personal Strategies, Institutional Programs, Strong Libraries, 12–14 August 2015, City of Cape Town, South Africa. Retrieved March 1, 2023 from: https://portal.research.lu.se/en/publications/developing-a-virtual-reference-service-based-on-team-development-.
Fullerton, V. (2002). IFLA digital reference standards project [Website]. Retrieved May, 4, 2005, Recuperado de http://archive.ifla.org/VII/s2036/pubs/drsp.htm.
Jafar Monfared, G. (2012). Providing centralized electronic reference services in the libraries of Al-Zahra University (S): a feasibility study (In persian). MSc Thesis, Al-Zahra University (S)]. Tehran. Iran. doi: https://ganj.irandoc.ac.ir/#/articles/5e110373ef09b36b3ddad1a15100f748.
Jafari Powersi, H., Sepehr, F., & Bozorgi, A. a.-S. (2015). Feasibility of creating a virtual reference network among the specialized libraries of art in Tehran. Scientific Quarterly (Library and Information Sciences and Information Technology), 8(29), 39-52. (in persian). from: https://qje.ntb.iau.ir/article_522214.html?lang=en
Jang, S. H., & Nam, Y. J. (2021). Content Analysis of Collaborative Digital Reference Service Knowledge Information Database. Journal of the Korean BIBLIA Society for library and Information Science, 32(2), 101-123. https://doi.org/https://doi.org/10.14699/kbiblia.2021.32.2.101
Jin, Y., Huang, M., Lin, H., & Guo, J. (2005). Towards Collaboration: The Development of Collaborative Virtual Reference Service in China. Journal of Academic Librarianship - J ACAD LIBR, 31, 287-291. https://doi.org/http://10.1016/j.acalib.2005.02.003
Mirhosseini, Z., & Khaledian, D. (2011). Feasibility of providing electronic reference services in university libraries of Hamedan city. [(in persian)]. Scientific Quarterly (Library and Information Sciences and Information Technology), 4(13), 51-64. https://doi.org/ https://qje.ntb.iau.ir/article_520599.html?lang=en
Najafikhah, K., Ruqiyeh. (2012). The feasibility of providing electronic reference services in the public libraries of Gilan province affiliated to the country's public libraries institution (In Persian) MSc Thesis, Allameh Tabatabai University]. Tehran, Iran.
Poluru, L., Patel, S., & Goswami, V. (2011). Virtual Reference Service with Reference to Collaborative Virtual Reference Service. . Retrieved March 1, 2023 from: https://www.researchgate.net/publication/259933327.
Sharifzadi, T. (2014). Feasibility of creating electronic reference services in the central library of Ilam University of Sciences (In persian). MSc Thesis, Shahid University]. Tehran, Iran. https://ganj.irandoc.ac.ir/#/articles/dcbcd19957fead126c7c16bed2ee3c5e.
Sinhababu, A., & Kumar, D. (2021). Strength Weakness Opportunity and Challenge (SWOC) of Collaborative Virtual Reference Service (VRS): A feasibility study in consortia environment. Retrieved March 1, 2023 from: https://www.researchgate.net/profile/Atasi-Sinhababu-2023/publication/351223943.
Stemper, J. A., & Butler, J. T. (2001). Developing a model to provide digital reference services. Reference Services Review, 29(3), 172-189. https://doi.org/10.1108/00907320110398133
Tabatabai Amiri, F. A. S., & Ahmadian, A. (2008). Collaborative digital reference services: a new way of providing digital reference services. Electronic journal of scientific communication(12), 111-136. https://doi.org/http://ejournal.irandoc.ac.ir/browse.php?a_code=A
Weak, E., & Luo, L. (2014). Collaborative virtual reference service: Lessons from the past decade. In Mergers and Alliances: The Operational View and Cases (Vol. 37, pp. 81-112). Emerald Group Publishing Limited. https://doi.org/10.1108/S0065-2830(2013)0000037008
Zare, A. A. (2016). Presenting a suggested model for creating virtual reference services in the libraries of officer universities of the Islamic Republic of Iran Army. MSc Thesis, University of Tehran]. Tehran, Iran. https://ganj.irandoc.ac.ir/#/articles/c15f632bf43de8d718e2df212a9b2c64.