@ARTICLE\{IMM1981-01770,
    author       = "H. Riis and S. Skyum",
    title        = "k-visit Attribute Grammars",
    year         = "1981",
    pages        = "17-28",
    journal      = "Mathematical Systems Theory",
    volume       = "15",
    editor       = "",
    number       = "",
    publisher    = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/1770-full.html"
}