@TECHREPORT\{IMM1997-02721,
    author       = "U. H. Thygesen and N. K. Poulsen",
    title        = "On Multi-dissipative perturbations in linear systems",
    year         = "1997",
    pages        = "24",
    number       = "1",
    series       = "",
    institution  = "epartment of Mathematical Modelling (IMM), The Technical University of Denmark",
    address      = "",
    type         = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/2721-full.html"
}