SEN, R. N. Associate Tensors and Affine Connections. The Journal of the Indian Mathematical Society, [S. l.], v. 27, n. 2, p. 45–56, 1963. DOI: 10.18311/jims/1963/16860. Disponível em: http://informaticsjournals.com/index.php/jims/article/view/16860. Acesso em: 28 apr. 2024.