http://www.healthinaging.org/blog/the-2015-updated-ags-beers-criteria-whats-new/
https://www.ncbi.nlm.nih.gov/pubmed/26446832
http://www.americangeriatrics.org/files/documents/beers/BeersCriteriaPublicTranslation.pdf (2012)
http://onlinelibrary.wiley.com/doi/10.1111/jgs.13702/full (2015)
http://www.medscape.com/viewarticle/854836 (see also)
http://www.americangeriatrics.org/
https://drive.google.com/drive/folders/0B5viXpvvYMYEVWk3MkZDNk5zS1E?usp=sharing