@article{HegemannNagel2013,
  author    = {Peter Hegemann and Georg Nagel},
  title     = {From channelrhodopsins to optogenetics},
  journal   = {EMBO Molecular Medicine},
  volume    = {5},
  number    = {2},
  doi       = {10.1002/emmm.201202387},
  year      = {2013},
}