Yildiz, A., and S. Zeren. “On 3-Dimensional Trans-Sasakian Manifolds With Regard to the Schouten-Van Kampen Connection”. International Journal of Maps in Mathematics, vol. 4, no. 2, Sept. 2021, pp. 107-20, https://journalmim.com/index.php/journalMIM/article/view/90.