SPEKTRA, Editor. Front Matter SPEKTRA Volume 9 Issue 2, August 2024. Spektra: Jurnal Fisika dan Aplikasinya, [S. l.], v. 9, n. 2, 2024. DOI: 10.21009/SPEKTRA.09200. Disponível em: https://journal.unj.ac.id/unj/index.php/spektra/article/view/49384. Acesso em: 22 nov. 2024.