@CONFERENCE\{IMM1989-01601,
    author       = "H. Riis Nielson and F. Nielson",
    title        = "The Mixed Lambda-Calculus and Combinatory Logic  (an overview)",
    year         = "1989",
    pages        = "39-45",
    booktitle    = "Computing and Information 1989",
    volume       = "",
    series       = "",
    editor       = "",
    publisher    = "North-Holland",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/1601-full.html"
}