Norshahrizan Nordin. “Non-Linear Berger’s Coefficient Prioritization for Quality of Sustainability in Healthcare Services”. Applied Mathematics and Computational Intelligence (AMCI) 7, no. 1 (December 31, 2018): 73–78. Accessed May 2, 2024. https://ejournal.unimap.edu.my/index.php/amci/article/view/173.