Synthesis and Characterization of Calcium Oxide Nanoparticles from Duck Eggshells using Ball Milling Methods. Jurnal Kimia Valensi, [S. l.], v. 5, n. 2, p. 231–135, 2019. DOI: 10.15408/jkv.v5i2.8779. Disponível em: https://journal.uinjkt.ac.id/index.php/valensi/article/view/8779. Acesso em: 9 oct. 2025.