@article{PetersenChristevSowada2000,
  author    = {Petersen, Hans-Georg and Christev, Atanas and Sowada, Christoph},
  title     = {Industrial policy and social security : summarising the results},
  year      = {2000},
  language  = {en}
}
@article{PetersenChristevFitzRoy2000,
  author    = {Petersen, Hans-Georg and Christev, Atanas and FitzRoy, Felix},
  title     = {Privatisation and ownership : the Impact on firms in transition ; survey evidence from Bulgaria},
  year      = {2000},
  language  = {en}
}
@article{PetersenChristev2000,
  author    = {Petersen, Hans-Georg and Christev, Atanas},
  title     = {Introduction},
  year      = {2000},
  language  = {en}
}