هيثم الرضوان, هديل عيسى and أصالة خضور (2023) “Design of a Ring National Science Foundation Network (NSFNET) based on Single-Pass and Double-Pass Wavelength Selective Switching (WSS)”, Tishreen University Journal -Engineering Sciences Series,, 45(2), pp. 65–83. Available at: https://journal.tishreen.edu.sy/index.php/engscnc/article/view/15153 (Accessed: 22July2024).