Farah Diyab, and B. Surender Reddy. “Analytic and Geometric Aspects of Laplace Operator on Riemannian Manifold”. Malaya Journal of Matematik 8, no. 04 (October 1, 2020): 1556–1561. Accessed November 24, 2024. https://www.malayajournal.org/index.php/mjm/article/view/1677.