Ahmed, M.K. et al. 2021. Different spectrophotometric methods manipulating ratio spectra for the assay of hydrocortisone acetate and clioquinol in their topical preparation. European Journal of Chemistry. 12, 3 (Sep. 2021), 265–272. DOI:https://doi.org/10.5155/eurjchem.12.3.265-272.2093.