Hussain Tarrad, Ali, and Ali Ghazi Mohammed. “A Mathematical Model for Thermo-Hydraulic Design of Shell and Tube Heat Exchanger Using a Step By Step Technique”. Journal of Engineering and Sustainable Development, vol. 10, no. 4, Dec. 2006, pp. 12-35, https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1769.