Boulal, Abdelhamid, and Seddik Ouakkas. “Some Results and Examples of the F-Biharmonic Maps on Warped Product Manifolds”. International Journal of Maps in Mathematics 3, no. 2 (September 21, 2020): 68–84. Accessed November 23, 2024. https://simadp.com/journalmim/article/view/69.