Rahman, Atta, Emeroylariffion RAbas, and Feroza Begum. “Analysis of Hexagonal Photonic Crystal Fiber Using the Golden Ratio”. International Journal of Engineering and Technology 7, no. 3.13 (July 27, 2018): 5–7. Accessed August 17, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/16313.