“It’s a Harmonic World.” Gamma: Exploring Euler's Constant, by Julian Havil and Freeman Dyson, Princeton University Press, PRINCETON; OXFORD, 2003, pp. 119–138, www.jstor.org/stable/j.ctt7sd75.18. Accessed 15 July 2020.
Havil, J., & Dyson, F. (2003). It’s a Harmonic World. In Gamma: Exploring Euler's Constant (pp. 119-138). PRINCETON; OXFORD: Princeton University Press. Retrieved July 15, 2020, from www.jstor.org/stable/j.ctt7sd75.18
Havil, Julian, and Freeman Dyson. "It’s a Harmonic World." In Gamma: Exploring Euler's Constant, 119-38. PRINCETON; OXFORD: Princeton University Press, 2003. Accessed July 15, 2020. www.jstor.org/stable/j.ctt7sd75.18.
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