@article{Ehab05,
  author    = {Ehab Al-Shaer and
               Hazem Hamed and
               Raouf Boutaba and
               M. Hasan},
  title     = {Conflict classification and analysis of distributed firewall
               policies},
  journal   = {IEEE Journal on Selected Areas in Communications},
  volume    = {23},
  number    = {10},
  year      = {2005},
  pages     = {2069-2084},
}