Agnihotri, N., Akhtar, S., Rathi, P., & Kaur, N. (2018). Extraction, Spectrophotometric Determination of Tungsten(VI) with 3-Hydroxy-2-[1′-phenyl-3′-(p-methylphenyl)-4’-pyrazolyl]-4-oxo-4H-1-benzopyran as Chelating Agent and its in situ Computational Studies. Asian Journal of Chemistry, 31(2), 275–278. https://doi.org/10.14233/ajchem.2019.21553