Zwarts, Cissé & Diallo 2005, pp. 23–26. Zwarts, Leo; Cissé, Navon; Diallo, Mori (2005), "Chapter 2: Hydrology of the Upper Niger", in Zwarts, Leo; van Beukering, Pieter; Kone, Bakary; et al. (eds.), The Niger, a lifeline: Effective water management in the Upper Niger Basin(PDF), Veenwouden, the Netherlands: Altenburg & Wymenga, pp. 15–41, ISBN90-807150-6-9. Also published in French with the title "Le Niger: une Artère vitale. Gestion efficace de l’eau dans le bassin du Haut Niger".