@CONFERENCE\{IMM2006-04893,
    author       = "B. Pajkovski and C. D. Jensen",
    title        = "PayBAC: A Payment Based Access Control Mechanism",
    year         = "2006",
    month        = "oct",
    pages        = "145-156",
    booktitle    = "Proceedings of the 11th Nordic Workshop on Secure {IT-}Systems (NordSec 2006)",
    volume       = "",
    series       = "",
    editor       = "Viiveke F{\aa}k",
    publisher    = "",
    organization = "",
    address      = "Link{\"{o}}ping, Sweden",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/4893-full.html"
}