@article{ZimmermannThienel2012,
  author    = {Zimmermann, Andreas and Thienel, Tobias},
  title     = {Yugoslavia, cases and proceedings before the ICJ},
  isbn      = {978-0-19-929168-7},
  year      = {2012},
  language  = {en}
}
@article{ZimmermannThienel2012,
  author    = {Zimmermann, Andreas and Thienel, Tobias},
  title     = {Article 60},
  isbn      = {978-0-19-969299-6},
  year      = {2012},
  language  = {de}
}