deletions | additions       diff --git a/bibliography/maser_references.bib b/bibliography/maser_references.bib  index ab13b58..d351a72 100644  --- a/bibliography/maser_references.bib  +++ b/bibliography/maser_references.bib 
...
}  @book{stahler_pall_2004, @book{stahler_palla_2004,  doi = {10.1002/9783527618675},  url = {http://dx.doi.org/10.1002/9783527618675},  year = {2004},