1. G. Darboux, Lecons sur la théorie des surfaces et les applications du calcul infinitesimal, t. 1–4, Gauthier-Villars, paris, 1877–1896.
2. Lezioni di Geometria Differenziale;Bianchi,1902
3. A Treatise on the Differential Geometry of Curves and Surfaces;Eisenhart,1909
4. Seminar on Differential Geometry,1992
5. Differential Geometry and Complex Analysis;Chern,1985