James M. Loresco, Pocholo, and Elmer P. Dadios. “A Scale-Invariant Lettuce Leaf Area Calculation Using Machine Vision and Knowledge-Based Methods”. International Journal of Engineering and Technology 7, no. 4 (February 26, 2019): 4880–4885. Accessed August 17, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/26553.