@INPROCEEDINGS{
       Author = {Murray, M. and claffy, k.}, 
       Title = {{Measuring the Immeasurable: Global Internet Measurement Infrastructure}},
       BookTitle = {Passive and Active Network Measurement Workshop (PAM)},
       Publisher = {RIPE NCC},
       Pages = {159-167},
       Address = {Amsterdam, Netherlands},
       Month = {Apr},
       Year = {2001},
       Keywords = {measurement methodology}
}