@article{articled8a73fb9, title = {Range extensions and conservation of some threatened or little known brazilian grassland birds}, author = {Lopes, Leonardo Esteves and Malacco, Gustavo Bernardino and Alteff, Eduardo França and Vasconcelos, Marcelo Ferreira de and Hoffmann, Diego and Silveira, Luís Fábio}, year = {2009}, doi = {10.1017/s0959270909990190}, journal = {Bird Conservation International} }