Almeida-Cortez, J. S. de; Tavares, F. M.; Schulz, K.; Pereira, R. de C. A.; Cierjacks, A. Floristic Survey of the Caatinga in Areas With Different Grazing Intensities, Pernambuco, Northeast Brazil. J. Env. Anal. Progr. 2016, 1, 43-51.