Dinh Thi, K.-T. “Multi-Station Smart Charging in Vietnam: A Quadratic-Programming Approach under the 2025 Retail-Tariff Revision”. HPU2 Journal of Science: Natural Sciences and Technology, vol. 5, no. 02, Aug. 2026, pp. 41-55, doi:10.56764/hpu2.jos.2026.5.02.41-55.