@TECHREPORT{nienaltowski06a,
  author = {Piotr Nienaltowski},
  title = {Refined access control policy for SCOOP},
  institution = {Computer Science Department, ETH Zurich},
  year = {2006},
  type = {Technical Report},
  number = {511},
  month = {February},
  owner = {piotr},
  timestamp = {2006.01.12},
}