LOVEJOY S. DAS; RAM NIVAS. On Submanifolds of Almost r – Contact Structure Manifolds. Journal of International Academy of Physical Sciences, [S. l.], v. 14, n. 3, p. 331–336, 2010. Disponível em: https://www.iaps.org.in/journal/index.php/journaliaps/article/view/244. Acesso em: 7 may. 2024.