Caguay, M., and A. M. Magboo. “Development and Evaluation of an Onion Bulb Size Grading Machine: A Promising Solution to Enhance Efficiency and Reduce Costs for Local Onion Farmers”. Journal of Engineering and Emerging Technologies, vol. 2, no. 1, Dec. 2023, pp. 12-24, doi:10.52631/jeet.v2i1.211.