@TECHREPORT{
       Author = {Mandalari, A. and Lutu, A. and Dhamdhere, A. and Bagnulo, M. and claffy, k.}, 
       Title = {{Tracking the Big NAT across Europe and the U.S.}},
       Institution = {Center for Applied Internet Data Analysis (CAIDA)},
       Month = {Apr},
       Year = {2017},
       Keywords = {ipv6   measurement methodology}
}