Gan, P.-T., S.-Y. Lim, H. Yu, M. Y. Mohd Hussin, and F. Muhammad. “A NORMATIVE APPROACH TO ECONOMIC UNCERTAINTY ESTIMATION”. Journal of Contemporary Issues and Thought, Vol. 3, Mar. 2019, pp. 156-65, https://ejournal.upsi.edu.my/index.php/JCIT/article/view/994.