Marra, Leandro Marciano, Paulo Henrique Grazziotti, Ubirajara Russi Nunes, and Fatima Maria de Souza Moreira. 2012. “Diazotrophic Bacteria in Star Flowers”. Bioscience Journal 28 (1). Uberlândia, MG:17-24. https://seer.ufu.br/index.php/biosciencejournal/article/view/12486.