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- ↑ Cummings, Joel (2011-10-25). "UK PubMed Central (UK PMC)2011380UK PubMed Central (UK PMC). URL: http://ukpmc.ac.uk: UKPMC Funders Group in partnership with the British Library, University of Manchester and the European Bioinformatics Institute Last visited May 2011. Gratis". Reference Reviews. 25 (8): 41–42. doi:10.1108/09504121111184507. ISSN 0950-4125.