@CONFERENCE\{IMM1990-02753,
    author       = "J. Parkum and N. K. Poulsen",
    title        = "Analysis of On-line Estimation Methods designed for the time-varying case",
    year         = "1990",
    pages        = "6.18-6.22",
    booktitle    = "Proceedings of the Nordic {CACE} Symposium, Lyngby",
    volume       = "",
    series       = "",
    editor       = "",
    publisher    = "",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/2753-full.html"
}