@INPROCEEDINGS{Selikov+95, author = {Селиков, A. Z. and Пономарь, L. A. and Крамаренко, L. S. and Золкин, Л. Ю.}, title = {On the approach to optimal control of queuing systems with multiple classes of customers}, booktitle = {Proc.\ International Conf.\ on Syst.\ Sci.\ XII.}, address = {Wroclaw (Poland)}, year = {1995}, pages = {507-515}, language = {russian}, }