@MISC\{IMM2005-03933,
    author       = "N. C. Albertsen",
    title        = "{GPAD} - A General Pre-Processor for Antenna Software",
    year         = "2005",
    month        = "jul",
    pages        = "2",
    publisher    = "European Space Agency",
    address      = "Noordwijk, The Netherlands",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/3933-full.html"
}