@book{Gawehn2017,
  author    = {Gawehn, Wilfried},
  title     = {Fundamente der Mathematik},
  url       = {http://nbn-resolving.de/urn:nbn:de:bsz:959-opus-4264},
  pages     = {1660},
  year      = {2017},
  abstract  = {Grundlagen der Mathematik f{\"u}r Studenten der Mathematik, Physik und Informatik},
  language  = {de}
}
@book{Reckzuegel2017,
  author    = {Reckz{\"u}gel, Matthias},
  title     = {Moderation, Pr{\"a}sentation und freie Rede},
  publisher = {Springer Vieweg},
  address   = {Wiesbaden},
  isbn      = {978-3-6581-8061-4},
  pages     = {52},
  year      = {2017},
  language  = {de}
}