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