DHRUWA NARAIN AND GAJENDRA NATH TRIPATHI. On Para-Sasakian Manifolds. Journal of International Academy of Physical Sciences, [S. l.], v. 13, n. 3, p. 261–267, 2009. Disponível em: https://www.iaps.org.in/journal/index.php/journaliaps/article/view/191. Acesso em: 18 may. 2024.