Goth, Gregory. “Degrees of Separation.” The Best Writing on Mathematics 2013, edited by Mircea Pitici, by ROGER PENROSE, Princeton University Press, PRINCETON; OXFORD, 2014, pp. 47–51, www.jstor.org/stable/j.ctt4cgb74.8. Accessed 5 Aug. 2020.
Goth, G. (2014). Degrees of Separation. In PENROSE R. (Author) & Pitici M. (Ed.), The Best Writing on Mathematics 2013 (pp. 47-51). PRINCETON; OXFORD: Princeton University Press. Retrieved August 5, 2020, from www.jstor.org/stable/j.ctt4cgb74.8
Goth, Gregory. "Degrees of Separation." In The Best Writing on Mathematics 2013, edited by Pitici Mircea, by PENROSE ROGER, 47-51. PRINCETON; OXFORD: Princeton University Press, 2014. Accessed August 5, 2020. www.jstor.org/stable/j.ctt4cgb74.8.
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