@article{Koehl2014,
  author    = {G{\"u}nther K{\"o}hl},
  title     = {Massenspektrometrische Untersuchungen an Germanium},
  journal   = {Zeitschrift f{\"u}r Naturforschung, A},
  volume    = {9},
  number    = {11},
  pages     = {913 -- 918},
  doi       = {10.1515/zna-1954-1102},
  year      = {2014},
}