Inequalities and Separation for a Biharmonic Laplace-Beltrami Differential Operator in a Hilbert Space Associated with the Existence and Uniqueness Theorem. J. Part. Diff. Eq. [Internet]. 2016 Mar. 5 [cited 2026 Feb. 26];29(1):59-70. Available from: https://global-sci.com/index.php/jpde/article/view/14966