deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index b0095dd..c9aae86 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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title = {{Forces in Molecules}},  journal = {Phys. Rev.},  }  @article{1941,  doi = {10.1002/ange.19410541109},  url = {http://dx.doi.org/10.1002/ange.19410541109},  year = {1941},  month = {mar},  publisher = {Wiley-Blackwell},  volume = {54},  number = {11-12},  pages = {156--156},  title = {{Einführung in die Quantenchemie. Von H. Hellmann. 350 S.,43 Abb. 35 Tab. Franz Deuticke, Leipzig u. Wien 1937. Pr. geh. {RM}. 20,-. geb. {RM}. 22,-}},  journal = {Angewandte Chemie},  }