Bowie, R. C. K., J. Fjeldså, J. Kiure, and J. B. Kristensen. “A New Member of the Greater Double-Collared Sunbird Complex (Passeriformes: Nectariniidae) from the Eastern Arc Mountains of Africa”. Zootaxa, vol. 4175, no. 1, Oct. 2016, pp. 23–42, doi:10.11646/zootaxa.4175.1.3.