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References

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    Kenna, R. and Berche, B. (2010) The extensive nature of group quality. Europhysics Letters, 90, 58002.
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    Kenna, R. and Berche, B. (2010) The critical mass and the dependency of research quality on group size. Scientometrics, 86, 527540.
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    Evidence (2010) The Future of the UK University Research Base. Report for Universities UK. Available at http://www.universitiesuk.ac.uk/Publications/Documents/UUK-FutureOfResearch-LiteratureReview.pdf.
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    Kenna, R. and Berche, B. (2011) Statistics of statisticians: Critical mass of statistics and operational research groups in the UK. Accepted for publication in International Journal of Modern Physics. (An earlier version is available at http://arxiv.org/abs/1102.4914).