@MISC\{IMM1975-03778,
    author       = "V. V. VIdal",
    title        = "A tutorial on planning",
    year         = "1975",
    pages        = "64",
    publisher    = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/3778-full.html"
}