Mullisa, Girma. “Digital Computer Control of Servomotor Angular Position”. Zede: Journal of Ethiopian Engineers and Architects የኢትዮጵያ መሐንዲሶችና አርክቴክቶች መጽሔት 13 (January 31, 2023): 24–29. Accessed March 16, 2026. https://ejol.aau.edu.et/index.php/ZEDE/article/view/6370.