deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index 2efdc4e..23ee5f1 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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@article{sensitivity,  author = "Crane, P. C., & and  Napier, P. J.", title = "Lecture 7. Sensitivity",  journal = "Synthesis Imaging in Radio Astronomy",  volume = "6", 
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year = "1989"  }  @article{design2,  author = "Holdaway, M. A., & and  Helfer, T. T.", title = "Lecture 27. Interferometric Array Design",  journal = "Synthesis Imaging in Radio Astronomy II",  volume = "180", 
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DOI = "http://library.nrao.edu/public/memos/alma/memo199.pdf"  }  @article{cost6,  author = "Yun, M. S., & and  Kogan, L", title = "ALMA Memo 199 - Cost-benefit Analysis of ALMA configurations"  year = "1999",  DOI = "http://library.nrao.edu/public/memos/alma/memo265.pdf"  }