SANATANI, S. Harald Fritzsch : The Curvature of Spacetime: Newton, Einstein and Gravitation. Indian Science Cruiser, [S. l.], v. 19, n. 4, p. 55–56, 2005. Disponível em: http://www.informaticsjournals.com/index.php/ISC/article/view/38580. Acesso em: 20 may. 2024.