deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index e00f128..bcb55e4 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
...
@article{koopman1997write,  title={How title = {{How  to write an abstract},  author={Koopman, abstract}},  author = {Koopman,  Philip}, journal={Carnegie journal = {Carnegie  Mellon University. Retrieved May}, volume={31},  pages={2013},  year={1997} volume = {31},  pages = {2013},  year = {1997},  }  @article{ashby2000write,  title={How title = {{How  to write a paper},  author={Ashby, paper}},  author = {Ashby,  Mike}, journal={Engineering journal = {Engineering  Department, University of Cambridge, Version}, volume={5},  pages={38},  year={2000} volume = {5},  pages = {38},  year = {2000},  }  @book{de2011engineering,  title={Engineering title = {{Engineering  systems: Meeting human needs in a complex technological world},  author={De world}},  author = {De  Weck, Olivier L and Roos, Daniel and Magee, Christopher L}, year={2011},  publisher={MIT Press} year = {2011},  publisher = {MIT Press},  }