Rena Octaria, Diana Diana, and Henry Kurnia Setiawan. “Analytical Method Validation of Sildenafil Citrate and Caffeine in Herbal Medicine for Increasing Stamina Using Thin Layer Chromatography – Densitometry”. Proceeding of The International Conference of Inovation, Science, Technology, Education, Children, and Health 5, no. 1 (June 30, 2025): 172–180. Accessed July 29, 2025. https://icistech.org/index.php/icistech/article/view/279.