Hashim, N. K., M. . Bayram, A. K. S. Ali, and G. . Somasundaram. “Role of Tunable Nonlinearities of Metamaterials on Tightly Focused Beam Generation”. Transactions in Optics and Photonics, vol. 1, no. 2, June 2026, pp. 151-63, https://ojs.wiserpub.com/index.php/top/article/view/9836.