^Allan, Tony; Keulertz, Martin; Sojamo, Suvi; Warner, Jeroen (2012). Handbook of land and water grabs in Africa: foreign direct investment and food and water security (1st ed.). Abingdon, United Kingdom: Routledge. p. 451. ISBN978-1857436693.
^ abGrawert, Elke (2010). After the comprehensive peace agreement in Sudan. Woodbridge, Suffolk [England]: James Currey. p. 104. ISBN978-1847010223.