Minh Bao, Tran, and Truong Cong Tuan. “Query Optimization in Object Oriented Databases Based on SD-Tree and N-Ary Tree”. EAI Endorsed Transactions on Context-aware Systems and Applications 3, no. 8 (March 9, 2016): e2. Accessed May 18, 2024. https://publications.eai.eu/index.php/casa/article/view/1986.