Rhayanny Assunção Ferreira, Magda, et al. “Analysis of Vanillin by TLC and HPLC-PDA in Herbal Material and Tincture from Vanilla Planifolia Jacks Ex. Andrews”. 2018. Drug Analytical Research, vol. 2, no. 2, Mar. 2026, pp. 1-7, doi:10.22456/2527-2616.87008.