UTAMA, Firman Yasa; SETIO, Huda Mei; SOERYANTO, Soeryanto. Analisis redesain Sistem Mixer Cement sebagai Pengolahan Limbah Batubara di PT. X. Otopro, [S. l.], v. 12, n. 2, p. 63–73, 2019. DOI: 10.26740/otopro.v12n2.p63-73. Disponível em: https://journal.unesa.ac.id/index.php/jo/article/view/4947. Acesso em: 9 jun. 2025.