エドゥアール・リュカ
Lucas, Edouard (1878). “Théorie des Fonctions Numériques Simplement Périodiques” (French) (PDF). American Journal of Mathematics (Johns Hopkins University Press) 1 (2): pp. 184-240 et 289-321. doi:10.2307/2369308. http://edouardlucas.free.fr/oeuvres/Theorie_des_fonctions_simplement_periodiques.pdf. Lucas, Edouard (1969) (English) (PDF). The Theory of Simply Periodic Numerical Functions. Translated by Sidney Kravitz. Fibonacci Association. p. 77. http://www.fq.math.ca/simply-periodic.html - Lucas(1878)の前半の英訳。