Siswadi, Siswadi, Heny Rianawati, Grace Serepina Saragih, Aziz Umroni, Retno Setyowati, and Soenarno Soenarno. 2024. “Recovery of Sterculia quadrifida R.Br. bark: A guide to sustainable bark harvesting for traditional medicine”. Agriculture and Natural Resources 58 (2). Bangkok, Thailand:221–230. https://li01.tci-thaijo.org/index.php/anres/article/view/263172.