C. Pansong, M. Thongpanchang, M. Madmuzor, P. Pranote, and P. Sawetmethikul, “Enhancing Workforce Skills in Industry 4.0 through an E-Book on KUKA Robot Control and Maintenance”, IJARPED, vol. 14, no. 4, pp. 1595–1603, Nov. 2025.