@CONFERENCE\{IMM1997-01691,
    author       = "H. A. Nielsen and H. Madsen and T. S. Nielsen",
    title        = "Conditionally Parametric {ARX-}models for Modelling time delays in district heating systems",
    year         = "1997",
    booktitle    = "International Symposium on District Heating and Simulation",
    volume       = "",
    series       = "",
    editor       = "\'{O}lafur P\'{e}tur P\'{a}lsson",
    publisher    = "",
    organization = "",
    address      = "Reykjavík, Iceland",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/1691-full.html"
}