1. Basic problems of telephone traffic theory and the influence of repeated calls;Cohen;Philips Telecommun. Rev.,1957
2. Approach to the theoretical description of repeated call attempts;Elldin;Ericsson Technics,1967
3. A survey of retrial queues;Falin;Queueing Systems,1990
4. A survey on retrial queues;Yaug;Queueing Systems,1987
5. Two models of a system with repeated calls;Zelinskij;Elektrosviaz,1978