@PHDTHESIS\{IMM1997-02469,
    author       = "K. T. Petersen",
    title        = "Estimation of speech quality in telecommunication systems",
    year         = "1997",
    school       = "Informatics and Mathematical Modelling, Technical University of Denmark, {DTU}",
    address      = "Richard Petersens Plads, Building 321, {DK-}2800 Kgs. Lyngby",
    type         = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/2469-full.html"
}