Dewi, Bhujangga Agung Ayu Sri Kartika and Kartini, Kartini (2023) System optimization and validation to improve thin-layer chromatography of roselle calyces (Hibiscus sabdariffa L.) required by the Indonesian Herbal Pharmacopoeia Edition II. Journal of Pharmacy & Pharmacognosy Research, 11 (2). pp. 243-254. ISSN 0719-4250