Information technologies and mathematical modelling [electronic resource] : queueing theory and applications : 14th International Scientific Conference, ITMM 2015, named after A.F. Terpugov, Anzhero-Sudzhensk, Russia, November 18-22, 2015, proceedings - Dudin, Alexander.; Nazarov, Anatoly.; Yakupov, Rafael. (Springer International Publishing : Imprint: Springer, 2015)