@INPROCEEDINGS{Selikov95,
    author = {Selikov, A. Z. and Ponomarenko, L. A. and Qranamarenko, L. S. and Zonomarenko, L. U.},
    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"
}

@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"
}
