deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index c81f1c3..811699c 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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}  @incollection{Lissen_2014,  doi = {10.1007/978-3-662-43473-4_2},  url = {http://dx.doi.org/10.1007/978-3-662-43473-4_2},  year = {2014},  publisher = {Springer Science $\mathplus$ Business Media},  pages = {27f},  author = {Nina Lissen and Christian Brünger and Stephan Damhorst},  title = {{Risiken beim Cloud-Computing}},  booktitle = {{IT}-Services in der Cloud und {ISAE} 3402},  }  @book{Lissen_2014a, @book{Lissen_2014,  doi = {10.1007/978-3-662-43473-4},  url = {http://dx.doi.org/10.1007/978-3-662-43473-4},  year = {2014},  publisher = {Springer Science $\mathplus$ Business Media},  pages = {27f},  author = {Nina Lissen and Christian Brünger and Stephan Damhorst},  title = {{{IT}-Services in der Cloud und {ISAE} 3402}},  }