Richard Westfall, The Life of Isaac Newton (Cambridge, U.K.: Cambridge University Press, 1993), стр. 71, 77–81.
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См. главу «A Private Scholar & Public Servant», in «Footprints of the Lion: Isaac Newton at Work», Cambridge University Library – Newton Exhibition, по состоянию на 28.10.2014, www.lib.cam.ac.uk/exhibitions/ Footprints_of_the_Lion/private_scholar.html.
