Pitici, Mircea, editor. “Acknowledgments.” The Best Writing on Mathematics 2013, by ROGER PENROSE, Princeton University Press, PRINCETON; OXFORD, 2014, pp. 241–242, www.jstor.org/stable/j.ctt4cgb74.27. Accessed 5 Aug. 2020.
PENROSE, R. (2014). Acknowledgments. In Pitici M. (Ed.), The Best Writing on Mathematics 2013 (pp. 241-242). PRINCETON; OXFORD: Princeton University Press. Retrieved August 5, 2020, from www.jstor.org/stable/j.ctt4cgb74.27
"Acknowledgments." In The Best Writing on Mathematics 2013, edited by Pitici Mircea, by PENROSE ROGER, 241-42. PRINCETON; OXFORD: Princeton University Press, 2014. Accessed August 5, 2020. www.jstor.org/stable/j.ctt4cgb74.27.
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