@article{Hummel2012,
  author    = {G{\"u}nter Hummel},
  title     = {Sicherheitsschalter f{\"u}r den Zeitrafferbetrieb von normalen Kameras},
  journal   = {Research film = Le film de recherche = Forschungsfilm},
  volume    = {4.1963},
  number    = {5},
  pages     = {468 -- 471},
  year      = {2012},
}