[1] A closer look at coal in Kalimantan, one section of deadly coal-coal exploitation and Kalimantan’s blighted generation, August 2010.
[2] source : https://www.hariansumutpos.com/2010/10/63088/digugat-rms-sby-batal-ke-belanda.html
[3] Sriwijaya Post - Rabu, 6 Oktober 2010 09:43 WIB
[4] International Energy Agency, Coal Information,2008)
[5] Baca laporan Carolyn Marr,DTE. Down to Earth No 85-86, August 2010.