1. N.H. Abel, Recherches sur les fonctions elliptiques, J. Reine Angew. Math. 2 (1827), 101–181; ibid. 3 (1828), 160–190; Œuvres I, 263–388
2. N.H. Abel, CEuvres complètes de Niels Henrik Abel, Johnson Reprint Corporation, 1965
3. A. Adler: Eisenstein and the Jacobian varieties of Fermat curves, Rocky Mt. Journal 27 (1997), 1–60
4. N. L. Ailing, Real Elliptic Curves, Mathematics Studies 54, North Holland, 1981
5. R. Ayoub: The lemniscate and Fagnano’s contributions to elliptic integrals, Archive for the History of Exact Sciences 29 (1984), 131–149