Carvalho, Ellen Cristina Dantas de, et al. “Ecological Succession in Two Remnants of the Caatinga in the Semi-Arid Tropics of Brazil”. Revista Brasileira De Biociências, vol. 10, nº 1, março de 2012, p. 13, https://seer.ufrgs.br/index.php/rbrasbioci/article/view/115599.