T. M. A. Shaalan and S. A. H. Khattab, “A Proposed Model to Interpret the Behavior of Macroeconomic / Market Variables and Their Linkage with the Saudi Petrochemical Sector”, JEALS, vol. 4, no. 3, pp. 181–171, Mar. 2020, doi: 10.26389/AJSRP.T171019.