http://www.africaneconomicoutlook.org/fileadmin/uploads/aeo/2013/ http://www.afdb.org/fileadmin/uploads/afdb/Documents/Project-and https://openknowledge.worldbank.org/bitstream/handle/10986/21402/ http://www.pwc.com/gx/en/paying-taxes/pdf/pwc http://www.bp.com/content/dam/bp/pdf/Energy-econo http://www.diplomatie.gouv.fr/fr/IMG/pdf/618_Resources_minerales_ http://www.developpement-durable.gouv.fr/IMG/pdf/Rep_-_Chiffres_cles_