@inproceedings{ZL04,

    author    = "Cai-Nicolas Ziegler and Georg Lausen",
    title     = "Spreading Activation Models for Trust Propagation",
    year      = "2004",
    month     = "March",
    booktitle = "Proceedings of the IEEE International Conference on e-Technology, e-Commerce, and e-Service",
    publisher = "IEEE Computer Society Press",
    address   = "Taipei, Taiwan"
}