Siddiqi, M.D., A. Haseeb, and M. Ahmad. “Skew Semi-Invariant Submanifolds of Generalized Quasi-Sasakian Manifolds”. Carpathian Mathematical Publications 9, no. 2 (January 2, 2018): 188–197. Accessed November 22, 2024. https://vps.pnu.edu.ua/index.php/cmp/article/view/1463.