Tran, C. V., and N. H. Ha. “A Variable Neighborhood Search Algorithm for Solving the Steiner Minimal Tree Problem in Sparse Graphs”. EAI Endorsed Transactions on Context-aware Systems and Applications 5, no. 15 (December 10, 2018): e4. Accessed July 3, 2024. https://publications.eai.eu/index.php/casa/article/view/1944.