@TECHREPORT\{IMM1997-02727,
    author       = "M. Xin and N. K. Poulsen and H. Bindner",
    title        = "Extremum tracking control of a Wind turbine",
    year         = "1997",
    pages        = "26",
    number       = "14",
    series       = "",
    institution  = "immdtu",
    address      = "",
    type         = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/2727-full.html"
}