Loader, S.P., Poynton, J.C., Davenport, T.R.B. and Rödel, M.-O. 2009. Re-description of the type series of Nectophrynoides viviparus (Bufonidae), with a taxonomic reassessment. Zootaxa. 2304, 1 (Dec. 2009), 41–50. DOI:https://doi.org/10.11646/zootaxa.2304.1.3.