Oppenheimer, Marina, and Luís Fábio Silveira. 2009. “ A Taxonomic Review of the Dark-Winged Trumpeter Psophia Viridis (Aves: Gruiformes: Psophiidae) ”. Papéis Avulsos De Zoologia 49 (41): 547-55. https://doi.org/10.1590/S0031-10492009004100001.