Liu, Yi, Zhiyi Ma, Hui Liu, Lai Wei, and Weizhong Shao. “A METAMODEL FOR ANALYSIS AND DESIGN OF NON-FUNCTIONAL REQUIREMENT”. Vietnam Journal of Science and Technology 49, no. 5 (August 9, 2012). Accessed January 10, 2026. https://vjs.ac.vn/jst/article/view/1897.