Rheindt, F. E., Christidis, L., Norman, J. A., Eaton, J. A., Sadanandan, K., & Schodde, R. (2017).
Speciation in Indo-Pacific swiftlets (Aves: Apodidae): Integrating molecular and phenotypic data for a new provisional taxonomy
of the Collocalia esculenta complex. Zootaxa; Magnolia Press, Auckland, New Zealand, 4250(5), 401-433. doi:10.11646/zootaxa.4250.5.1.