Mofarreh, F., and U.C. De. “Kenmotsu 3-Manifolds and Gradient Solitons”.
Carpathian Mathematical Publications
15, no. 1 (June 20, 2023): 120–127. Accessed April 17, 2025. https://journals.pnu.edu.ua/index.php/cmp/article/view/5326.