Study of N(k)-Quasi Einstein Manifolds with Certain Curvature Restrictions. Journal of International Academy of Physical Sciences, [S. l.], v. 26, n. 4, p. 363–383, 2022. Disponível em: http://www.iaps.org.in/journal/index.php/journaliaps/article/view/890. Acesso em: 23 oct. 2026.