@article{SchwarzAndraeArnoldetal.1999,
  author    = {Schwarz, W. H. Eugen and Andrae, Dirk and Arnold, S. R. and Heidberg, Joachim and Hellmann jr., H. and Hinze, J. and Karachalios, A. and Kovner, M. A. and Schmidt, P. C. and Z{\"u}licke, Lutz},
  title     = {Hans G. Hellmann (1903 - 1938) : ein deutscher Pionier der Quantenchemie in Moskau},
  year      = {1999},
  language  = {de}
}
@article{SchwarzAndraeArnoldetal.1999,
  author    = {Schwarz, W. H. Eugen and Andrae, Dirk and Arnold, S. R. and Heidberg, Joachim and Hellmann jr., H. and Hinze, J. and Karachalios, A. and Kovner, M. A. and Schmidt, P. C. and Z{\"u}licke, Lutz},
  title     = {Hans G. Hellmann (1903 - 1938) : ein Pionier der Quantenchemie},
  year      = {1999},
  language  = {de}
}