@article{HelbigHelbigKnechtetal.2007,
  author    = {Matthias Helbig and Silke Helbig and Rainald Knecht and Heike Anette Kahla-Witzsch and Wolfgang Gst{\"o}ttner},
  title     = {Qualit{\"a}tsmanagement nach DIN EN ISO 9001:2000 an der HNO-Universit{\"a}tsklinik Frankfurt/Main},
  year      = {2007}
}