Symmetry of second derivatives (English Wikipedia)

Minguzzi 2015. Minguzzi, E. (2015). "The equality of mixed partial derivatives under weak differentiability conditions". Real Analysis Exchange. 40: 81–98. arXiv:1309.5841. doi:10.14321/realanalexch.40.1.0081. S2CID 119315951.

berkeley.edu

"Young's Theorem" (PDF). University of California Berkeley. Archived from the original (PDF) on 2006-05-18. Retrieved 2015-01-02.

Allen 1964, pp. 300–305. Allen, R. G. D. (1964). Mathematical Analysis for Economists. New York: St. Martin's Press. ISBN 9781443725224.
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James 1966, p. ^{[page needed]}. James, R. C. (1966). Advanced Calculus. Belmont, CA: Wadsworth.

Minguzzi 2015. Minguzzi, E. (2015). "The equality of mixed partial derivatives under weak differentiability conditions". Real Analysis Exchange. 40: 81–98. arXiv:1309.5841. doi:10.14321/realanalexch.40.1.0081. S2CID 119315951.
McGrath 2014. McGrath, Peter J. (2014), "Another proof of Clairaut's theorem", Amer. Math. Monthly, 121 (2): 165–166, doi:10.4169/amer.math.monthly.121.02.165, S2CID 12698408
Aksoy & Martelli 2002. Aksoy, A.; Martelli, M. (2002), "Mixed Partial Derivatives and Fubini's Theorem", College Mathematics Journal of MAA, 33 (2): 126–130, doi:10.1080/07468342.2002.11921930, S2CID 124561972
Katz 1981. Katz, Victor J. (1981), "The history of differential forms from Clairaut to Poincaré", Historia Mathematica, 8 (2): 161–188, doi:10.1016/0315-0860(81)90027-6

Higgins 1940. Higgins, Thomas James (1940). "A note on the history of mixed partial derivatives". Scripta Mathematica. 7: 59–62. Archived from the original on 2017-04-19. Retrieved 2017-04-19.

Euler 1740. Euler, Leonhard (1740). "De infinitis curvis eiusdem generis seu methodus inveniendi aequationes pro infinitis curvis eiusdem generis" [On infinite(ly many) curves of the same type, that is, a method of finding equations for infinite(ly many) curves of the same type]. Commentarii Academiae Scientiarum Petropolitanae (in Latin). 7: 174–189, 180–183 – via The Euler Archive, maintained by the University of the Pacific.

Minguzzi 2015. Minguzzi, E. (2015). "The equality of mixed partial derivatives under weak differentiability conditions". Real Analysis Exchange. 40: 81–98. arXiv:1309.5841. doi:10.14321/realanalexch.40.1.0081. S2CID 119315951.
McGrath 2014. McGrath, Peter J. (2014), "Another proof of Clairaut's theorem", Amer. Math. Monthly, 121 (2): 165–166, doi:10.4169/amer.math.monthly.121.02.165, S2CID 12698408
Aksoy & Martelli 2002. Aksoy, A.; Martelli, M. (2002), "Mixed Partial Derivatives and Fubini's Theorem", College Mathematics Journal of MAA, 33 (2): 126–130, doi:10.1080/07468342.2002.11921930, S2CID 124561972

Marshall, Donald E., Theorems of Fubini and Clairaut (PDF), University of Washington

"Young's Theorem" (PDF). University of California Berkeley. Archived from the original (PDF) on 2006-05-18. Retrieved 2015-01-02.
Higgins 1940. Higgins, Thomas James (1940). "A note on the history of mixed partial derivatives". Scripta Mathematica. 7: 59–62. Archived from the original on 2017-04-19. Retrieved 2017-04-19.

Apostol 1965. Apostol, Tom M. (1965), Mathematical analysis: a modern approach to advanced calculus, London: Addison-Wesley, OCLC 901554874