Nguyen, Ngoc Hung, Van Manh Nguyen, Ngoc Linh Nguyen, and Tuan Anh Tran. “Phase Portrait Analysis of a Cantilevered Piezoelectric-Electromagnetic Energy Harvester”. Journal of Water Resources and Environmental Engineering, no. 97 (December 17, 2025): 85–90. Accessed November 13, 2026. https://thuyloi.vojs.vn/index.php/tlmt/article/view/38.