@ARTICLE\{IMM2004-03618,
    author       = "J. V. S{\o}rensen and H. Madsen and H. Madsen",
    title        = "Efficient Kalman filter techniques for the assimilation of tide gauge data in three-dimensional modeling of the North Sea and Baltic Sea system",
    year         = "2004",
    pages        = "14",
    journal      = "Journal of Geophysical Research - Part C - Oceans",
    volume       = "109",
    editor       = "",
    number       = "3",
    publisher    = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/3618-full.html"
}