"On-The-Go Assessment of Seed Metering Unit Performance Using an Opto-Electronic Sensor". University of Khartoum Engineering Journal 2, no. ENGINEERING (ديسمبر 11, 2022). تاريخ الوصول يوليو 8, 2026. https://onlinejournals.uofk.edu/kuej/article/view/1275.