JPFA, E. Front Cover JPFA Vol 9 No 2 December 2019. Jurnal Penelitian Fisika dan Aplikasinya (JPFA), [S. l.], v. 9, n. 2, p. i, 2019. DOI: 10.26740/jpfa.v9n2.pi. Disponível em: https://journal.unesa.ac.id/index.php/jpfa/article/view/7199. Acesso em: 5 may. 2024.