deletions | additions       diff --git a/bibliography/maser_references.bib b/bibliography/maser_references.bib  index bfe907b..f97635b 100644  --- a/bibliography/maser_references.bib  +++ b/bibliography/maser_references.bib 
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title = {{Collisional pumping of {SiO} masers in evolved stars}},  journal = {Nature},  }  @article{Herrnstein_1999,  doi = {10.1038/22972},  url = {http://dx.doi.org/10.1038/22972},  year = {1999},  month = {aug},  publisher = {Nature Publishing Group},  volume = {400},  number = {6744},  pages = {539--541},  author = {J. R. Herrnstein and J. M. Moran and L. J. Greenhill and P. J. Diamond and M. Inoue and N. Nakai and M. Miyoshi and C. Henkel and A. Riess{\#}},  journal = {Nature},  }