U. C. De and B. K. De, “ON THE EXISTENCE OF A TYPE OF RICCI-RECURRENT MANIFOLD”, Mat. Bilt., vol. 31, no. 1, pp. 79–84, Jan. 2007, Accessed: Aug. 14, 2026. [Online]. Available: https://bilten.smm.org.mk/index.php/bilten/article/view/1736