J. A. da S. Santana, A. S. Pimenta, J. S. Souto, F. V. de Almeida, and M. V. Pacheco, “FLORISTIC SURVEY AND SPECIES ASSOCIATION IN THE CAATINGA OF THE SERIDÓ ECOLOGICAL STATION, SERRA NEGRA DO NORTE-RN - BRAZIL”, Green Journal, vol. 4, no. 4, pp. 83–89, Oct. 2009.