deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index cef8b5a..d588d5d 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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month = {Sep},  pages = {773-773},  }  @article{Liu_Nocedal_1989,  title = {{On the limited memory BFGS method for large scale optimization}},  volume = {45},  url = {http://dx.doi.org/10.1007/BF01589116},  doi = {10.1007/BF01589116},  number = {1-3},  journal = {Mathematical Programming},  publisher = {Springer Science + Business Media},  author = {Liu, Dong C. and Nocedal, Jorge},  year = {1989},  month = {Aug},  pages = {503-528},  }