Prof. Dr. Zena Khalefa Kadhim, Ban Ghulam Ridha Ali,. “Enhancement the Heat Transfer Rate of a Counter Flow Heat Exchanger by Using Longitudinal Fins With Different Cross-Sections and Heights”. Design Engineering (November 2, 2021): 9273-9285. Accessed May 2, 2024. http://www.thedesignengineering.com/index.php/DE/article/view/5971.