Anthelme, F.; Waziri Mato, M.; Maley, J. (2008). „Elevation and local refuges ensure persistence of mountain specific vegetation in the Nigerien Sahara“. Journal of Arid Environments. 72: 2232–2242. doi:10.1016/j.jaridenv.2008.07.003.
peakbagger.com
Peakbagger listing. Compare Jolijn Geels (2006) pp 177, 183-84 and Decalo (1997) p. 216.
