IPA, Universe. Introduction, UNIVERSE, Vol. 2 No.1. Universe, [S. l.], v. 2, n. 1, 2021. DOI: 10.24036/universe.v2i1.231. Disponível em: http://universe.ppj.unp.ac.id/index.php/universe/article/view/231. Acesso em: 16 jul. 2026.