P K DWIVEDI; S. C. RASTOGI; C. K. MISHRA; A K DWIVEDI. On Symmetric, Semi-Symmetric and Quarter-Symmetric Riemannian Manifolds. Journal of International Academy of Physical Sciences, [S. l.], v. 26, n. 3, p. 237–246, 2022. Disponível em: https://www.iaps.org.in/journal/index.php/journaliaps/article/view/950. Acesso em: 18 may. 2024.