R. Mohammad, F. Sharifi, D. Sharifi, N. Othman, and Z. A. Kadir. 2015. “Optimization of Heat Exchanger Network in Olefin Unit of Oil Refinery”. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 13 (1):1-16. https://semarakilmu.com.my/journals/index.php/fluid_mechanics_thermal_sciences/article/view/2569.