1. Bar-Ilan, J.: Which h-index? A comparison of WoS, Scopus and Google Scholar. Scientometrics 74(2), 257–271 (2008)
2. Cleverdon, C.W.: The evaluation of systems used in information retrieval. In: Proceedings of the International Conference on Scientific Information, vol. 1, pp. 687–698. National Academy of Sciences, National Research Council (1959)
3. Lecture Notes in Computer Science;P. Clough,2006
4. A.-W. Harzing. Citation analysis across disciplines: The impact of different data sources and citation metrics (2010),
http://www.harzing.com/data_metrics_comparison.htm
(retrieved)
5. Hirsch, J.E.: An index to quantify an individuals scientific research output. Proceedings of the National Academy of Sciences (PNAS) 102(46), 16569–16572 (2005)