@TECHREPORT\{IMM1990-02756,
    author       = "J. Parkum and N. K. Poulsen",
    title        = "Identifiability Analysis and Calibration of Models for Waste Water Treatment Processes",
    year         = "1990",
    number       = "2",
    series       = "",
    institution  = "Institute of Mathematical Statistics and Operations Research (IMSOR), The Technical University of Denmark",
    address      = "",
    type         = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/2756-full.html"
}