Karaca , Fatma, and Cihan Özgür. “$\boldsymbol{f}$-Biharmonic and Bi-$\boldsymbol{f}$-Harmonic Submanifolds of Product Spaces”. Sarajevo Journal of Mathematics 13, no. 1 (May 19, 2017): 115–129. Accessed November 21, 2024. https://sjm.anubih.ba/index.php/sjm/article/view/107.