Bello, M. N., and M. A. Musa. “Retrofit Design of Heat Exchanger Networks for Kaduna Refinery’s Vacuum Distillation Unit”. ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY AND ENVIRONMENT, Vol. 20, no. 4, Feb. 2025, pp. 926-35, https://azojete.com.ng/index.php/azojete/article/view/995.