J. C. Cheng and V. Venkataraman, “A Web-based Collaborative System Framework for Green Building Certification”, ijscet, vol. 4, no. 2, pp. 52–66, Nov. 2013, Accessed: Apr. 09, 2026. [Online]. Available: https://publisher.uthm.edu.my/ojs/index.php/IJSCET/article/view/680