@CONFERENCE\{IMM2006-05005,
    author       = "J. F. Nilsson",
    title        = "Ontological Constitutions for Classes and Properties",
    year         = "2006",
    booktitle    = "14th Int. Conf. on Conceptual Structures, {ICCS} 2006",
    volume       = "",
    series       = "Lecture Notes in Artificial Intelligence {LNAI} 4068",
    editor       = "H. Schaerfe, P. Hitzler, P. {\O}hrstr{\o}m",
    publisher    = "Springer",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/5005-full.html",
    isbn_issn    = "{ISSN} 0302-9743"
}