@CONFERENCE\{IMM1991-02573,
    author       = "C. K. Hansen and P. Thyregod",
    title        = "Analysis of contaminated field failure data for repairable systems",
    year         = "1991",
    pages        = "604-609",
    booktitle    = "Proceedings of the Annual Reliability and Maintainability Symposium",
    volume       = "",
    series       = "",
    editor       = "",
    publisher    = "",
    organization = "",
    address      = "Orlando, {FL}",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/2573-full.html"
}