Kaur, N., et al. “Microdetermination of Palladium(II) Using 6-Chloro-3-Hydroxy-7-Methyl-2-(2′-Thienyl)-4-Oxo-4H-1-Benzopyran”. Asian Journal of Chemistry, vol. 32, no. 7, June 2020, pp. 1597-02, https://asianpubs.org/index.php/ajchem/article/view/2378.