Ali, S. M., Moshref, H. S., ibrahim, S. K., Mohammed, H. A., Shakor, Z. M., & Mohmud, S. (2018). Studies and Modeling for Upgrading Units for Heavy Oil Refineries. Journal of Petroleum Research and Studies, 8(2), 240-255. https://doi.org/10.52716/jprs.v8i2.247