H. F.  Greeney, Juiña-J., M. E., Harris, J. B. C., Wickens, M. T., Winger, B., Gelis, R. A., Miller, E. T., and Solano-Ugalde, A., ?Observations on the breeding biology of birds in south-eastern Ecuador?, Bulletin of the British Ornithologists? Club, vol. 130, pp. 61-68, 2010.

H. F.  Greeney, Martin, P. R., Gelis, R. A., Solano-Ugalde, A., Bonier, F., Freeman, B., and Miller, E. T., ?Notes on the breeding of high-Andean birds in northern Ecuador?, Bulletin of the British Ornithologists? Club, vol. 131, pp. 24-31, 2011.