@CONFERENCE\{IMM2004-03101,
    author       = "T. Thomadsen and T. Stidsen",
    title        = "Optimal Design of Hierarchical Ring Networks",
    year         = "2004",
    month        = "mar",
    booktitle    = "{INFORMS} Telecom",
    volume       = "",
    series       = "",
    editor       = "",
    publisher    = "Informatics and Mathematical Modelling, Technical University of Denmark, {DTU}",
    organization = "",
    address      = "Richard Petersens Plads, Building 321, {DK-}2800 Kgs. Lyngby",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/3101-full.html"
}