“Development and Validation of HPLC Method for Determination of Quercetin in Hydrogel Transdermal Patches Loaded with Red Onion Peel Extract: doi.org/10.26538/tjnpr/v6i8.8” (2022) Tropical Journal of Natural Product Research, 6(8), pp. 1210–1214. Available at: https://www.tjnpr.org/index.php/home/article/view/1289 (Accessed: 2 January 2026).