G. Tecson, R., Mateo, J. M., Tamani, J. and Embat, E. (2024) “HydroNutriGuard: A Mobile-Based Hydroponics Nutrient Tracker with Recommender System for Lettuce”, Isabela State University Linker: Journal of Engineering, Computing and Technology, 1(2), pp. 15–25. Available at: https://isujournals.ph/index.php/ject/article/view/140 (Accessed: 18October2025).