Sarkar, A., & Sen, M. (2012). On Invariant Submanifolds of Trans-Sasakian Manifolds. Proceedings of the Estonian Academy of Sciences. Physics, Mathematics, 61(1), 29-37. https://www.airitilibrary.com/Article/Detail?DocID=14060086-201203-201205160006-201205160006-31-39
Sarkar, A., & Sen, M. (2012). On Invariant Submanifolds of Trans-Sasakian Manifolds. Proceedings of the Estonian Academy of Sciences, 61(1), 29-37. https://www.airitilibrary.com/Article/Detail?DocID=17367530-201203-201310180033-201310180033-29-37