Arifin, Wan Mohd Hilmey W Mohd, et al. “A Selective Fluorescent Chemosensor Based on Chromone Hydrazone Ligand for Zinc Ions”. CENTRAL ASIA AND THE CAUCASUS, vol. 23, no. 1, Jan. 2022, pp. 2011-20, https://ca-c.org/CAC/index.php/cac/article/view/265.