Mostafa Ezzat Mostafa Ahmed, Mohammed Naguib Al-kashab, Sherif Mohammed Galal, Ibrahim Mohammed Ibrahim (2024) “Malignant Biliary Obstruction; Evolving Endoscopic Diagnostic and Therapeutic Modalities”, Pegem Journal of Education and Instruction, 14(3), pp. 1328–1332. Available at: https://pegegog.net/index.php/pegegog/article/view/5342 (Accessed: 12 October 2026).