S. Champetier, Sakho, D., Toure, M., y Water and Sanitation Program - West and Central Africa - Abidjan, CI, WSP-WCA,
«Independent water and sanitation providers in Africa : Dakar, Senegal», vol. no. 9. Water and Sanitation Program - West and Central Africa (WSP-WCA), Abidjan, Ivory Coast, p. 8 p. : boxes, fig., 2000.
