SINGH, K. D.; TRIPATHI, M. M. Semi-Invariant Submanifolds of an almost r-Paracontact Riemannian Manifold. The Journal of the Indian Mathematical Society, [S. l.], v. 60, n. 1-4, p. 29–40, 1994. Disponível em: http://informaticsjournals.com/index.php/jims/article/view/21913. Acesso em: 3 may. 2024.