@article{oppenheimer_silveira_2009,  title={A taxonomic review of the Dark-winged Trumpeter Psophia viridis (Aves: Gruiformes: Psophiidae)},  volume={49},  ISSN={0031-1049},  url={https://doi.org/10.1590/S0031-10492009004100001},  DOI={10.1590/S0031-10492009004100001},  number={41},  journal={Papéis Avulsos de Zoologia},  publisher={Museu de Zoologia da Universidade de São Paulo},  author={Oppenheimer, Marina and Silveira, Luís Fábio},  year={2009},  pages={547–555} }