@misc{duffield:pam07,
    author  = "Nick Duffied and Kartik Gopalan and Michael Hines and
               Aman Shaikh and Jacobus E. van der Merwe",
    title   = "{Positioning Relay Nodes in ISP Networks}",
    howpublished = "Passive and Active Conference (PAM) Poster",
    month   = "April",
    year    = 2007
}