1. Beall , J. 2013 Beall's list of predatory publishers 2013 http://scholarlyoa.com/2012/12/06/bealls-list-of-predatory-publishers-2013/
2. Open access versus subscription journals: A comparison of scientific impact;Björk;BMC Medicine,2012
3. A hybrid open-access model to bridge the publishing divide and reach out to a broader community;Ohno-Machado;Journal of the American Medical Informatics Association,2011