JPFA, E. Cover. Jurnal Penelitian Fisika dan Aplikasinya (JPFA), [S. l.], v. 5, n. 2, p. i, 2015. DOI: 10.26740/jpfa.v5n2.pi. Disponível em: https://journal.unesa.ac.id/index.php/jpfa/article/view/825. Acesso em: 19 may. 2024.