@misc{Linssen2013,
  author    = {Linssen, R.},
  title     = {Vortrag: Destruktive F{\"u}hrung aus Sicht der Mitarbeiter. Vortrag an der ESMT (European School of Management and Technology) Schloss Gracht, Erftstadt bei K{\"o}ln},
  year      = {2013},
  language  = {en}
}
@incollection{LinssenMarks2009,
  author    = {Linssen, R. and Marks, E.},
  title     = {School shootings - Considerations on prevention subject to relative ignorance of the phenomenon},
  series = {Coester, M. \& Marks, E. (Hrsg.), International Perspectives of Crime Prevention 2. Contributions from the 2nd Annual International Forum 2008},
  booktitle = {Coester, M. \& Marks, E. (Hrsg.), International Perspectives of Crime Prevention 2. Contributions from the 2nd Annual International Forum 2008},
  edition   = {1.Aufl},
  publisher = {Forum Verlag Godesberg},
  address   = {M{\"o}nchengladbach},
  isbn      = {978-3-936999-},
  pages     = {89 -- 98},
  year      = {2009},
  language  = {en}
}