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title = {{Einführung in die Quantenchemie}},  booktitle = {Hans Hellmann: Einführung in die Quantenchemie},  }  @article{Lindhard_1961,  doi = {10.1103/physrev.124.128},  url = {http://dx.doi.org/10.1103/physrev.124.128},  year = {1961},  month = {oct},  publisher = {American Physical Society ({APS})},  volume = {124},  number = {1},  pages = {128--130},  author = {J. Lindhard and M. Scharff},  title = {{Energy Dissipation by Ions in the kev Region}},  journal = {Phys. Rev.},  }