M. A. Ferreira and M. A. Andrade,  "AN INFINITE SERVERS QUEUE SYSTEMS WITH POISSON AND NON POISSON ARRIVALS BUSY PERIOD SIMULATION", in Emerging Issues in the Natural and Applied Sciences, Baku, Azerbeijão, © Progress IPS LLC, 2013 © IJAR, 2013, 2014, vol. 3, pp. 38-58