@InCollection {pilba.AJSS09,
    author = {C.A. Ardagna and S. Jajodia and P. Samarati and A. Stavrou},
    editor = {C. Bettini and S. Jajodia and P. Samarati and S. Wang},
    booktitle = {Privacy in Location Based Applications: Research Issues and Emerging Trends},
    title = {Privacy Preservation over Untrusted Mobile Networks},
    publisher = {Springer},
    pages = {84--105},
    year = {2009}
}