@article{Zimmermann2012,
  author    = {Zimmermann, Andreas},
  title     = {Article 27},
  isbn      = {978-0-19-958015-6},
  year      = {2012},
  language  = {de}
}
@article{Zimmermann2012,
  author    = {Zimmermann, Andreas},
  title     = {Abiding by and enforcing international humanitarian law in asymmetric warfare : the case of "operation cast lead"},
  issn      = {0554-498x},
  year      = {2012},
  language  = {en}
}