1. In Research Excellence Framework;Assessment Framework and Guidance on Submissions,2012
2. Garfield and the impact factor;Bensman;Annual Review of Information Science and Technology,2007
3. Bibliometrics Pilot Exercise (n.d.). In Higher Education Funding Council for England. Available from: http://www.ref.ac.uk/background/bibliometrics (accessed 25 April 2013).
4. Bibliometrics and the Research Excellence Framework (n.d.). In Higher Education Funding Council for England. Available from: http://www3imperial.ac.uk/pls/portallive/docs/1/46819696.PDF. (accessed 25 April 2013).
5. Towards usage-based impact metrics: first results from the MESUR Project;Bollen,2008