“Pengaruh Fragmentasi Terhadap Digging Time Dan Produktivitas Excavator Liebher R9400 Pada Area Peledakan PT Dahana Site Adaro: The Effect Of Fragmentation On The Digging Time And Productivity Of Liebher R9400 Excavator At the Blasting Area Of PT Dahana site Adaro” (2020) MINERAL, 5(2), pp. 7–11. doi:10.33019/mineral.v5i2.3067.