@CONFERENCE\{IMM2004-03530,
    author       = "H. Bruun and J. F. Nilsson",
    title        = "Entity-Relationship Models reconsidered as Grammars and Algebras",
    year         = "2004",
    booktitle    = "14th European-Japanese Conference on Information Modelling and Knowledge Bases",
    volume       = "",
    series       = "",
    editor       = "Pre-proceedings, Y. Kiyoki et al. (eds.)",
    publisher    = "",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/3530-full.html"
}