@misc{Lehner2007,
  author    = {Franz Lehner},
  title     = {Manchmal hilft nur gesetzlicher Zwang. Prof. Franz Lehner {\"u}ber Trittbrettfahrer},
  booktitle = {WAZ},
  number    = {251},
  type      = {contributiontoperiodical},
  pages     = {WBH3\_750},
  year        = {2007},
}