1. Alnowibet, K., and L. Tadj. 2007. A quorum queueing system with bernoulli vacation schedule and restricted admissibility. Advanced Modelling and Optimization 9 (1): 171–180.
2. Badamchi Zadeh, A. 2009. An MX/(G1, G2)/1/G(Bs)Vs with optional second services and admissibility restricted. International Journal of Information and Management Sciences 20: 305–316.
3. Choudhury, G. 2008. A note on the MX/G/1 queue with a random setup time under a restricted admissibility policy with a Bernoulli vacatoin schedule. Statistical Methodology 5 (1): 21–29.
4. Ebenesar Anna Bagyam, J., and K. Udaya Chandrika. 2013. Multi-stage retrial queueing system with bernoulli feedback. International Journal of Scientific and Engineering Research 4 (9): 496–499.
5. Erlang, A.K. 1909. Probability and telephone calls. Nyt Tidsskr Krarup Mat Ser B 20: 33–39.