@ARTICLE\{IMM1998-0462,
    author       = "P. C. Hansen",
    title        = "Rank-Deficient Prewhitening with Quotient {SVD} and {ULV} Decompositions",
    year         = "1998",
    pages        = "34-43",
    journal      = "BIT",
    volume       = "38",
    editor       = "",
    number       = "",
    publisher    = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/462-full.html"
}