van Velzen, R., T. B. Larsen, and F. T. Bakker. “A New Hidden Species of the Cymothoe caenis-Complex (Lepidoptera: Nymphalidae) from Western Africa”. Zootaxa, vol. 2197, no. 1, Aug. 2009, pp. 53–63, doi:10.11646/zootaxa.2197.1.5.