Harman AE, Nandiyanto ABD. Engineering and Economic Evaluation of Production of Fe3O4 Nanoparticles. J. Tek. Kim. Ling [Internet]. 2020 Apr. 28 [cited 2026 Nov. 1];4(1):68-80. Available from: https://jurnal.polinema.ac.id/index.php/jtkl/article/view/1615