1. Open access megajournals—have they changed everything? Available at http://creativecommons.org.nz/2013/10/open-access-megajournals-have-they-changed-everything/ (accessed 16 March 2014)
2. Developing an effective market of open access article processing charges. Final report to the wellcome trust. Available at http://www.wellcome.ac.uk/About-us/Policy/Spotlight-issues/Open-access/Guides/WTP054773.htm (accessed 30 March 2014)
3. Frequently asked questions 2014. Available at http://bmjopen.bmj.com/site/about/faqs.xhtml#4(accessed 16 March 2014)
4. PLoS ONE output falls following impact factor decline. Available at http://scholarlykitchen.sspnet.org/2014/03/07/plos-one-output-falls-following-impact-factor-decline/ (accessed 16 March 2014)