IPA, Universe. Introduction, UNIVERSE, Vol. 2 No. 2. Universe, [S. l.], v. 2, n. 2, 2021. DOI: 10.24036/universe.v2i2.287. Disponível em: http://universe.ppj.unp.ac.id/index.php/universe/article/view/287. Acesso em: 22 jul. 2026.