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  1. J. Virtamo, Insensitivity of a network of symmetric queues with balanced service rates, Internal Report, 2003 (pdf)(bib)
    Abstract: Previous insensitivity results on queueing systems include on one hand, e.g., symmetric queues in isolation and, on the other hand, networks of processor sharing queues with globally dependent balanced service rates, i.e. so-called Whittle networks. In this paper we show that insensitivity property of a queueing network with balanced service rates is retained when each of the processor sharing nodes is replaced by any kind of symmetric queue.