@CONFERENCE\{IMM1991-02926,
    author       = "H. Madsen and B. F. Nielsen",
    title        = "The Use of Phase Type Distributions for Modelling Packet-Switched Traffic",
    year         = "1991",
    pages        = "593-599",
    booktitle    = "Teletraffic and Datatraffic in a Period of Change",
    volume       = "",
    series       = "",
    editor       = "A. Jensen and V.B. Iversen",
    publisher    = "Elsevier Science Publishers",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/2926-full.html"
}