Zainuddin, N. A. M., Laforgue, A., Boonruang, S., Mohammed, W. S., & Jolivot, R. (2026). Solution-Based Fertilizer Detection Using Guided-Mode Resonance Optical Sensors: A Comparative Study with a Commercial Multispectral Sensor. Engineering Journal, 30(8), 81-101. https://doi.org/10.4186/ej.2026.30.8.81