@CONFERENCE\{IMM1990-02767,
    author       = "N. K. Poulsen and J. Holst and J. Parkum",
    title        = "System Identification - a Sensitivity Approach",
    year         = "1990",
    pages        = "5.13-5.21",
    booktitle    = "Proceedings of the Nordic {CACE} Symposium, Lyngby",
    volume       = "",
    series       = "",
    editor       = "",
    publisher    = "",
    organization = "",
    address      = "",
    note         = "Also as {IMSOR} preprint",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/2767-full.html"
}