@BOOK\{IMM2001-0589,
    author       = "H. Riis Nielson",
    title        = "{POPL} 2001: the 28th {ACM} sigplan - sigact symposium on principles of programming languages",
    year         = "2001",
    volume       = "",
    number       = "",
    series       = "",
    publisher    = "{ACM} Press",
    address      = "",
    edition      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/589-full.html"
}