DE, U. C.; DE, B. K. ON THE EXISTENCE OF A TYPE OF RICCI-RECURRENT MANIFOLD. Matematichki Bilten, [S. l.], v. 31, n. 1, p. 79–84, 2007. Disponível em: https://bilten.smm.org.mk/index.php/bilten/article/view/1736. Acesso em: 14 aug. 2026.