Hutagalung, J. “Synthesis Oxalic Acid from Durian Skin (Durio Zibethinus) With Alkali Smelting Method”. Sainteks: Jurnal Sain Dan Teknik, Vol. 6, no. 1, Mar. 2024, pp. 26-33, doi:https://doi.org/10.37577/sainteks.v6i1.640.