@article{rocha_queiroz_pirani_2004,  title={Plant species and habitat structure in a sand dune field in the brazilian Caatinga: a homogeneous habitat harbouring an endemic biota},  volume={27},  ISSN={0100-8404},  url={https://doi.org/10.1590/S0100-84042004000400013},  DOI={10.1590/S0100-84042004000400013},  number={4},  journal={Brazilian Journal of Botany},  publisher={Sociedade Botânica de São Paulo},  author={Rocha, Pedro Luís B. da and Queiroz, Luciano P. de and Pirani, José Rubens},  year={2004},  month={Oct},  pages={739–755} }