“Estimating Concentration of Toxic Ions Arsenic in Water by Using Photonic Crystal Fiber Based on Surface Plasmon Resonance (SPR)”. Baghdad Science Journal 21, no. 2 (February 1, 2024): 0445. Accessed June 3, 2025. https://bsj-ojs.uobaghdad.edu.iq/index.php/BSJ/article/view/7651.