See Junn Wayne, Novita Sakundarini, C. M. M. Chin, R. G. Raja Ariffin, and S. N. . Syed Azmi. “Integrating Green Affective Values and Materials Selection in Automotive Design: A Preliminary Study”. International Journal of Integrated Engineering, vol. 12, no. 5, June 2020, pp. 43-54, https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/5687.