N. T. Khanh, H. A. Minh, D. P. Dung, V. Paarbrahm, and J. C. Roux, “Speed Regulation of Direct Current Motor Using AC-DC Buck Boost Converter by using Soft Starter Method”, Journal of Engineering, Technology, and Applied Science, vol. 6, no. 1, pp. 1-8, Apr. 2024.