@PHDTHESIS\{IMM1988-02916,
    author       = "B. F. Nielsen",
    title        = "Modelling of Multiple Access Systems with Phase Type Distributions",
    year         = "1988",
    month        = "may",
    school       = "{IMSOR,} {DTU,} Denmark",
    address      = "",
    type         = "",
    note         = "pp.1-253",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/2916-full.html"
}