@misc{cryptoeprint:2008:502,
    author = {Vanesa Daza and Javier Herranz and Paz Morillo and Carla Rafols},
    title = {Extended Access Structures and Their Cryptographic Applications},
    howpublished = {Cryptology ePrint Archive, Report 2008/502},
    year = {2008},
    url = {http://eprint.iacr.org/2008/502},
}