KEMAJOU MBIAKOP, T.; NGAKEU, F. . Null hypersurface normalized by the structure vector field in a para-Sasakian manifold. International Journal of Maps in Mathematics, [S. l.], v. 8, n. 1, p. 85–105, 2025. Disponível em: https://simadp.com/journalmim/article/view/217. Acesso em: 4 apr. 2025.