Priyati, A., A. Ansar, and S. Haji Abdullah. “Karakteristik Dan Simulasi Sistem Kontrol Hidrolik Pada Proses Pengepresan Biji Jaraks Kepyar (Ricinus Communis L.): Characteristic and Simulation of Hydraulic Control System OnCastor Beans (Ricinus Communis L.) Press Processing”. Jurnal Ilmiah Rekayasa Pertanian Dan Biosistem, vol. 3, no. 2, Sept. 2015, pp. 164-9, https://jrpb.unram.ac.id/index.php/jrpb/article/view/27.