Silva, Alderlan Wellington de Oliveira, Carolina Florio Castro, e Hernani Loebler Campos. 2009. “Impacts of Ecotourism on the Bog of Serra Negra - Bezerros/ PE”. Sociedade & Natureza 1 (1). https://seer.ufu.br/index.php/sociedadenatureza/article/view/9787.