K.  Eisermann, Arbeiter, S., López, G., Avendaño, C., J. Lux, deLeón, Burge, A., A. Lux, deLeón, and Buchán, A., ?Nesting ecology of the Endangered Azure-rumped Tanager (Tangara cabanisi) in Guatemala.?, Ornitolog{\'?a Neotropical, vol. 22, pp. 39?57, 2011.