Shaikh, A.A., and C.S. Bagewadi. “On 𝘕(𝑘)-Contact Metric Manifolds”. CUBO, A Mathematical Journal 12, no. 1 (March 1, 2010): 181–193. Accessed May 17, 2024. https://cubo.ufro.cl/ojs/index.php/cubo/article/view/1436.