1. Aksin, Z., Armony, M., & Mehrotra, V. (2007). The modern call-center: a multi-disciplinary perspective on operations management research. Available from: http://portal.ku.edu.tr/~zaksin/CallCenterSurvey.pdf.
2. An M/PH/k retrial queue with finite number of sources;Alfa;Computers & Operations Research,2004
3. Armony, M., & Maglaras C. (2002). On Customer Contact Centers with a Call-Back Option: Customer Decisions, Routing Rules, & System Design. Available from: http://www1.gsb.columbia.edu/faculty/cmaglaras/papers/static.pdf.
4. Armony, M., Maglaras C. (2003). Contact Centers with a Call-Back Option and Real-Time Delay Information. Available from: http://www.gsb.columbia.edu/faculty/cmaglaras/papers/cc-dynamic.
5. Computation of the limiting distribution in queuing systems with repeated attempts and disasters;Artalejo;RAIRO Operations Research,1999