Loniza, Erika, Dewanti Catur Dhamayanti, and Meilia Safitri. “Dehydration Level Detector through Human Urine With LED and LDR”. Journal of Robotics and Control (JRC) 2, no. 3 (May 5, 2021): 140–144. Accessed September 6, 2025. https://journal.umy.ac.id/index.php/jrc/article/view/9642.