Santi, D. ., A. . Muin, and A. D. N. . Lestari. “Determination of Major Cation and Anion Content in Coconut Fiber Ash Potentially Renewable Catalyst: Penentuan Kandungan Kation Dan Anion Mayor Dalam Abu Serabut Kelapa Berpotensi Katalis Renewable”. JISTECH: Journal of Information Science and Technology, vol. 6, no. 2, Jan. 2023, https://jurnal.unipa.ac.id/index.php/istech/article/view/141.