Editing Fermat's principle (section)

== Further reading ==

{{refbegin}}
* {{citation | author=A. Bhatia | title=To save drowning people, ask yourself 'What would light do?' | work=Nautilus | date=26 March 2014 | url=http://nautil.us/blog/to-save-drowning-people-ask-yourself-what-would-light-do | access-date=7 August 2019}}.
* [[Jed Buchwald|J.Z. Buchwald]], 1989, ''The Rise of the Wave Theory of Light: Optical Theory and Experiment in the Early Nineteenth Century'', University of Chicago Press, {{ISBN|0-226-07886-8}}, especially {{nowrap|pp.{{tsp}}36–40}}.
* {{citation | author1 = M.G. Katz | author1-link = Mikhail Katz | author2 = D.M. Schaps | author3 = S. Shnider | author3-link = Steve Shnider | title = Almost Equal: the method of adequality from Diophantus to Fermat and beyond | journal = [[Perspectives on Science]] | volume = 21 | issue = 3 | year = 2013 | pages = 283–324 | doi = 10.1162/POSC_a_00101 | arxiv = 1210.7750 | bibcode = 2012arXiv1210.7750K| s2cid = 57569974 }}.
* [[Michael Sean Mahoney|M.S. Mahoney]] (1994), ''The Mathematical Career of Pierre de Fermat, 1601–1665'',{{tsp}} 2nd&nbsp;Ed., Princeton University Press, {{ISBN|0-691-03666-7}}.
* R. Marqués; [[Ferran Martin|F. Martín]]; M. Sorolla, 2008 (reprinted 2013), ''Metamaterials with Negative Parameters: Theory, Design, and Microwave Applications'', Hoboken, NJ: Wiley, {{ISBN|978-0-471-74582-2}}.<!-- § 1.5, eq.(1.23) -->
* [[John Pendry|J.B. Pendry]] and [[David R. Smith (physicist)|D.R.&nbsp;Smith]] (2004), [https://physicstoday.scitation.org/doi/pdf/10.1063/1.1784272 "Reversing Light With Negative Refraction"], ''Physics Today'', {{nowrap|'''57''' (6): 37–43}}, {{doi|10.1063/1.1784272}}.
{{refend}}

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