Plácido, R.A. de A., Borges, S.H. e Silva, E.G. da (2021) “A protocol to evaluate the potential of protected areas for birdwatching tourism: a study case in the Brazilian Amazon”, Revista Brasileira de Ecoturismo (RBEcotur), 14(4). doi:10.34024/rbecotur.2021.v14.11173.