Schuchmann, K.-L., Weller, A.-A. and Jürgens, D. 2016.

Biogeography and taxonomy of racket-tail hummingbirds (Aves: Trochilidae: Ocreatus): evidence for species delimitation from morphology and display behavior

. Zootaxa. 4200, 1 (Nov. 2016), 83–108. DOI:https://doi.org/10.11646/zootaxa.4200.1.3.