YULIANDRA, B.; SUTANTO, A.; PRASOJO, H. An Assessment Framework for Small-Scale Coal Mining Based on Lean Thinking and Green Mining Concept. International Series on Interdisciplinary Science and Technology, [S. l.], v. 3, n. 2, p. 170–175, 2018. DOI: 10.23960/ins.v3i2.175. Disponível em: http://insist.unila.ac.id/index.php/ojs/article/view/114. Acesso em: 14 jul. 2025.