@techreport{yang2003metro,
  author = {Yang, Hyo-Sik and Reisslein, Martin and Herzog, Martin and Maier, Martin and Wolisz, Adam},
  title = {{Metro WDM Networks: Comparison of Ring and Star Topologies}},
  institution = {Telecommunication Networks Group (TKN), TU Berlin (TUB)},
  location = {Berlin, Germany},
  month = {5},
  number = {TKN-03-005},
  type = {Technical Report},
  year = {2003},
}