@TECHREPORT\{IMM1992-06718,
    author       = "H. F. Ravn",
    title        = "Optimal scheduling of combined heat and power",
    year         = "1992",
    number       = "",
    series       = "Technical report / {IMSOR} ; 10",
    institution  = "Technical University of Denmark, Department of Applied Mathematics and Computer Science",
    address      = "Matematiktorvet, Building 303B, {DK-}2800 Kgs. Lyngby, Denmark, compute@compute.dtu.dk",
    type         = "",
    url          = "http://www.compute.dtu.dk/English.aspx"
}