@TECHREPORT{RotLauKawBuh02,
    author = "Roth, V. and Laub, J. and Kawanabe, M. and Buhmann, J.M.",
    title = "Optimal Cluster Preserving Embedding of Non-Metric Proximity Data",
    institution = "University of Bonn",
    year = "2002",
    type = "Technical Report",
    number = "IAI-TR-2002-5",
    address = "Bonn"
}