CHANG, John; SARIO, Leo. Royden’s Algebra on Riemannian Spaces. MATHEMATICA SCANDINAVICA, [S. l.], v. 28, p. 139–158, 1971. DOI: 10.7146/math.scand.a-11012. Disponível em: https://tidsskrift.dk/math/article/view/11012. Acesso em: 13 aug. 2026.