SSATP
2004, Technical document
Peter Watson
1998, Technical document
Africa Union and UN Economic Commission for Africa
2005, Technical document
Christian G. Roko
2004, Technical document
The World Bank
2004, Technical document
.
2003, Technical document
.
1999, Technical document
John IGUE
2004, Technical document
John IGUE
2004, Technical document
Jan DOLEJSI
1999, Technical document