@INCOLLECTION\{IMM2005-04361,
    author       = "J. F. Nilsson and H. Bruun",
    title        = "Entity-Relationship Models reconsidered as Grammars and Algebras",
    year         = "2005",
    booktitle    = "Information Modelling and Knowledge Bases {XVI}",
    volume       = "",
    number       = "",
    series       = "Frontiers in Artificial Intelligence and Applications",
    publisher    = "{IOS} Press",
    address      = "Amsterdam",
    edition      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/4361-full.html",
    isbn_issn    = "{ISSN} 0922-6389"
}