== References ==* Arop Madut Arop (2006) "Sudan's Painful Road To Peace: Founding and Development of SPLM/SPLA", ISBN 1-4196-1153-4* Root Causes of Sudan's Civil Wars (African Issues) by Douglas H. Johnson (Paperback - 16 Jan 2003) ISBN 0-85255-392-7== External links ==* http://www.sudantribune.com/spip.php?iframe&page=imprimable&id_article=26987* http://news.bbc.co.uk/1/hi/7380412.stm* http://www.sudantribune.com/spip.php?iframe&page=imprimable&id_article=26987
* Air crash kills Sudanese minister* South Sudan mourns again* Arop Madut Arop (2006) "Sudan’s Painful Road To Peace: Founding and Development of SPLM/SPLA", ISBN 1-4196-1153-4* Root Causes of Sudan’s Civil Wars (African Issues) by Douglas H. Johnson (Paperback — 16 Jan 2003) ISBN 0-85255-392-7