@CONFERENCE\{IMM1997-02691,
    author       = "C. K. Hansen and P. Thyregod",
    title        = "On the use of field failure data for repairable systems to identify sources of variation",
    year         = "1997",
    pages        = "221-247",
    booktitle    = "Frontiers of Statistical Quality Control",
    volume       = "5",
    series       = "",
    editor       = "H.-J.Lenz, P.-Th. Wilrich",
    publisher    = "Physica Verlag",
    organization = "",
    address      = "Heidelberg",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/2691-full.html"
}