Abu Hasan, et al. “COMPARATION OF RUBBER MILLING PROCESS TO PRODUCE NATURAL RUBBER COUMPOUNDS USING MODIFIED AND UNMODIFIED LOCAL CLAY FILLER”. Jurnal Sains Materi Indonesia, vol. 21, no. 2, Mar. 2025, pp. 69-75, https://ejournal.brin.go.id/jsmi/article/view/6045.