Muryanto, S, and H M Ang. “An Interesting Final-Year Undergraduate Laboratory Project: Investigation of Gypsum Scale Formation on Piping Surfaces”. ASEAN Journal of Chemical Engineering 5, no. 2 (December 31, 2005): 116-124. Accessed July 17, 2024. https://journal.ugm.ac.id/v3/AJChE/article/view/7640.