@article{nascimento_rodal_cavalcanti_2003,  title={Phytosociology of the remaining xerophytic woodland associated to an environmental gradient at the banks of the São Francisco river - Petrolina, Pernambuco, Brazil},  volume={26},  ISSN={0100-8404},  url={https://doi.org/10.1590/S0100-84042003000300001},  DOI={10.1590/S0100-84042003000300001},  number={3},  journal={Brazilian Journal of Botany},  publisher={Sociedade Botânica de São Paulo},  author={Nascimento, Clóvis E.S. and Rodal, Maria J.N. and Cavalcanti, Antônio C.},  year={2003},  month={Jul},  pages={271–287} }