@TECHREPORT\{IMM2000-01237, author = "P. C. Hansen and P. K. Hansen and S. D. Hansen and J. A. S{\o}rensen", title = "Canonical filters and rank-reduction algorithms", year = "2000", month = "aug", number = "", series = "", institution = "", address = "", type = "", url = "http://www2.compute.dtu.dk/pubdb/pubs/1237-full.html", isbn_issn = "IMM-REP-2000-13" }