@ARTICLE\{IMM1981-04366,
    author       = "K. Conradsen and H. Spliid",
    title        = "A seanonal filter for use in Box Jenkins analysis of time series",
    year         = "1981",
    journal      = "Journal Roy. Stat. Soc., ser. C",
    volume       = "30",
    editor       = "",
    number       = "2",
    publisher    = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/4366-full.html"
}