“HARD LINES.” How Round Is Your Circle?: Where Engineering and Mathematics Meet, by John Bryant and Chris Sangwin, Princeton University Press, PRINCETON; OXFORD, 2008, pp. 1–16, www.jstor.org/stable/j.ctt7rq7h.5. Accessed 31 July 2021.
Bryant, J., & Sangwin, C. (2008). HARD LINES. In How Round Is Your Circle?: Where Engineering and Mathematics Meet (pp. 1-16). PRINCETON; OXFORD: Princeton University Press. Retrieved July 31, 2021, from http://www.jstor.org/stable/j.ctt7rq7h.5
Bryant, John, and Chris Sangwin. "HARD LINES." In How Round Is Your Circle?: Where Engineering and Mathematics Meet, 1-16. PRINCETON; OXFORD: Princeton University Press, 2008. Accessed July 31, 2021. http://www.jstor.org/stable/j.ctt7rq7h.5.
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