; . Jurnal Ilmiah Sains, [S. l.], v. 14, n. 1, p. 29–34, 2014. DOI: 10.35799/jis.14.1.2014.4948. Disponível em: https://ejournal.unsrat.ac.id/v3/index.php/JIS/article/view/4948. Acesso em: 18 jul. 2024.