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Mills, Michael S L; Cohen, Callan (2007). "Brazza's Martin Phedina brazzae: new information on range and vocalisations". Ostrich. 78 (1): 51–54. doi:10.2989/OSTRICH.2007.78.1.8.52. S2CID54629328.
web.archive.org
World Wildlife Fund (lead ed.); Sigsgaard, Lene; McGinley, Mark (topic eds.) "Eastern Congolian swamp forestsArchived 2012-10-17 at the Wayback Machine". In Cleveland, Cutler J (ed.) (2006). Encyclopedia of Earth. Environmental Information Coalition and National Council for Science and the Environment. Retrieved 4 November 2012.
worldbirdnames.org
Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (July 2021). "Swallows". IOC World Bird List Version 11.2. International Ornithologists' Union. Retrieved 18 July 2021.