Penerapan Metode Grey System Pada Peramalan Produk Olefin. Jurnal EurekaMatika, [S. l.], v. 6, n. 2, p. 52–63, 2018. Disponível em: https://ejournal-science.upi.edu/jem/article/view/180. Acesso em: 1 jul. 2026.