Al-Dulaimi, A. O., J. Deem, and M. F. Saleh. “Are All Constitutional Rules Created Equal? Substantive Hierarchy in Constitutions in Theory and Practice”. Journal of Malaysian and Comparative Law, vol. 45, no. 1. Jun, Dec. 2018, pp. 47-72, http://mjs.um.edu.my/index.php/JMCL/article/view/20926.