HERMAN, K.; SUGIONO, J. P. Studi Pengukuran Kekerasan Benda dengan Analisa Spektral. Journal of Informatics Development, [S. l.], v. 1, n. 2, p. 65–74, 2023. DOI: 10.30741/jid.v1i2.1091. Disponível em: https://ejournal.itbwigalumajang.ac.id/index.php/jid/article/view/1091. Acesso em: 17 may. 2024.