[1]
B. Fauziyah, M. Khoiriyah, A. Hakim, and A. Wafi, “Development of Urea Sensor Based on colorimetric method and Digital RGB Analysis”, IJET, vol. 8, no. 1.9, pp. 332–334, Jan. 2019, doi: 10.14419/ijet.v8i1.9.26680.