@article{Hartmann2014,
  author    = {Hermann Hartmann},
  title     = {Eine neue quantenmechanische Behandlung von CH4 und NH4+},
  journal   = {Zeitschrift f{\"u}r Naturforschung, A},
  volume    = {2},
  number    = {9},
  pages     = {489 -- 492},
  doi       = {10.1515/zna-1947-0903},
  year      = {2014},
}