@incollection{SchmitzWeber2007,
  author    = {Schmitz, Philipp and Weber, Martin},
  title     = {Setze nicht alles auf eine Karte, diversifiziere!},
  series = {Genial einfach investieren},
  booktitle = {Genial einfach investieren},
  publisher = {Campus-Verlag},
  address   = {Frankfurt a.M.},
  pages     = {104 -- 140},
  year      = {2007},
  language  = {de}
}
@article{SchmitzWeber2007,
  author    = {Schmitz, Philipp and Weber, Martin},
  title     = {Buying and selling behavior of individual investors in option-like securities},
  pages     = {1 -- 36},
  year      = {2007},
  language  = {en}
}