1. Project Euclid, Chapter 19, Geometric Solutions of Quadratic and Cubic Equation. https://projecteuclid.org/ebook/download?urlId10.3792/euclid/9781429799850-23&isFullBook=false
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4. Jesper Lützen, The algebra of geometric impossibility: Descartes and Montucla on the impossibility of the duplication of the cube and the trisection of the angle, Centaurus, Vol.52, No.1, pp.4–37, 2010. doi:https://doi.org/10.1111/j.1600-0498.2009.00160.x
5. Pierre-Laurent Wantzel, Recherches sur les moyens de reconnaître si un Problème de Géométrie peut se résoudre avec la règle et le compas, J. de Math. et Appl. (PDF), Vol.1, No.2, pp.366–372, 1837, Retrieved 3 March 2014.