@CONFERENCE\{IMM1999-01504,
    author       = "K. K. Andersen and M. Lundby and H. Madsen",
    title        = "Identification of continuous time smooth  threshold models of physical systems",
    year         = "1999",
    keywords     = "threshold model",
    booktitle    = "Joint Statistical Meetings",
    volume       = "",
    series       = "",
    editor       = "",
    publisher    = "",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/1504-full.html"
}