@incollection{LinssenMarks2009,
  author    = {R. Linssen and E. Marks},
  title     = {School shootings - Considerations on prevention subject to relative ignorance of the phenomenon},
  booktitle = {Coester, M. \& Marks, E. (Hrsg.), International Perspectives of Crime Prevention 2. Contributions from the 2nd Annual International Forum 2008},
  edition   = {1.Aufl},
  isbn      = {978-3-936999-},
  year      = {2009},
}