@article{Czerny2014,
  author    = {Marianus Czerny},
  title     = {{\"U}ber die Rotgrenze der Augenempfindlichkeit},
  journal   = {Zeitschrift f{\"u}r Naturforschung, A},
  volume    = {4},
  number    = {7},
  pages     = {521 -- 523},
  doi       = {10.1515/zna-1949-0407},
  year      = {2014},
}