@techreport{koepke2004using,
  author = {K{\"{o}}pke, Andreas and Karl, Holger and L{\"{o}}bbers, Marc},
  title = {{Using energy where it counts: Protecting important messages in the link layer}},
  institution = {Telecommunication Networks Group (TKN), TU Berlin (TUB)},
  location = {Berlin, Germany},
  month = {9},
  number = {TKN-04-014},
  type = {Technical Report},
  year = {2004},
}