“Optimization Formula of Caffeine Nano-EMULGEL Using Isopropyl Myristate and Isopropanol As Penetration Enhancer and Evaluation on Its Penetration in Vitro”. Science Proceedings Series 6, no. 1 (September 10, 2025): 13–14. Accessed May 11, 2026. https://readersinsight.net/index.php/SPS/article/view/3281.