Jebbar, Wid Alaa, and Mishall Al-Zubaidie. “Improving Security in E-Transaction Blockchain Systems by Segmenting Processes into Separate Zones and Using Smart Contracts Arbitration”. Iraqi Journal of Science 66, no. 6 (June 30, 2025): 2502–2522. Accessed December 10, 2025. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/12719.