Knapp S (2002). Assessing patterns of plant endemism in Neotropical uplands. Botanical Review 68: 22–37.
Lambrechts C, Woodley B, Church C, and Gachanja M (2003). Report on the Aerial Survey of the Destruction of the Aberdare Range Forests. Nairobi: United Nations Environment Programme.
Levin R A, Myers N R, and Bohs L (2006). Phylogenetic relationships among the "spiny" solanums (Solanum subgenus Leptostemonum). Amer. J. Bot. 93: 157–169.
Vorontsova M S, Christenhusz MJM, Kirika P, Muthoka P (2010). Three new species of Solanum from Kenya: using herbarium specimens to document environmental change. Systematic Botany, in press.
Weese, T L and Bohs L (2007). A three-gene phylogeny of the genus Solanum (Solanaceae). Systematic Botany 32: 445–463.