1. Cavalieri's method of indivisibles;Kirsti Andersen;Arch. Hist. Exact Sci,1985
2. Essai sur l'histoire de la g�om�trie des courbes;A Aubry;M�thode de Fermat pour la quadrature des courbes,1909
3. Johannis Bernoulli ... Opera omnia : tam antea sparsim edita, quam hactenus inedita ..
4. Fermat's integration of X n;Carl B Boyer;Nat. Math. Mag,1945
5. Problem 410;J A Bullard;Amer. Math. Monthly,1916