H. I. Badi'ah, Shinta Wulansari, and Ulfatun Hasanah, “Rapid and Sensitive Gold Nanoparticles Based Colorimetric Sensor for Mn(II) Ions Detection: A Potential Approach for Urinary Health Monitoring”, sci. technol. indones., vol. 11, no. 4, pp. 1344–1359, Sep. 2026.