Thi, Vũ Đức, and Trịnh Đình Vinh. “Alpha-Functional Dependencies and Alpha-Closure in the Database Model of Block Form”. Journal of Computer Science and Cybernetics 26, no. 2 (April 27, 2012): 131–140. Accessed November 23, 2024. https://vjs.ac.vn/index.php/jcc/article/view/527.