(en) Ridgely, R.S. & Robbins, M.B., 1988. Pyrrhura orcesi, a new parakeet from southwestern Ecuador, with systematic notes on the P. melanura complex. Wilson Bull. 100(2): 173-182. pdf. Gearchiveerd op 19 juni 2023.
web.archive.org
(en) Ridgely, R.S. & Robbins, M.B., 1988. Pyrrhura orcesi, a new parakeet from southwestern Ecuador, with systematic notes on the P. melanura complex. Wilson Bull. 100(2): 173-182. pdf. Gearchiveerd op 19 juni 2023.