1. ABCYa! Online word cloud generator. http://www.abcya.com/word_clouds.htm . Accessed 26 August 2014.
2. Adams, J. (2005). Early citation counts correlate with accumulated impact. Scientometrics, 63(3), 567–581.
3. Aksnes, D. W. (2011). Evaluation of research in biology, medicine and health in Norway (2010–2011), publication and citation analysis. Oslo: Nordic Institute for Studies in Innovation, Research and Education (NIFU).
4. Antelman, K. (2004). Do open-access articles have a greater research impact? College & Research Libraries, 65(5), 372–382.
5. Borgatti, S. P., Everett, M. G. & Freeman, L. C. (2002). Ucinet 6 for Windows: Software for social network analysis. Harvard, MA: Analytic Technologies. https://sites.google.com/site/ucinetsoftware/downloads . Accessed 21 July 2014.