(en) Peter J. C. Moses, « Circles and triangle centers associated with the Lucas circles », Forum Geometricorum, vol. 5, , p. 97–106 (MR2195737, lire en ligne)
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(en) Ross Honsberger, Episodes in Nineteenth and Twentieth Century Euclidean Geometry, vol. 37, Cambridge University Press, (ISBN9780883856390, lire en ligne), p. 110.
(en) Florian Cajori, A history of elementary mathematics: with hints on methods of teaching, The Macmillan company, (lire en ligne), p. 261.
(en) Peter J. C. Moses, « Circles and triangle centers associated with the Lucas circles », Forum Geometricorum, vol. 5, , p. 97–106 (MR2195737, lire en ligne)