Gamarra Ruiz Diaz, Lila Mabel, et al. “Phytosociological Analysis of a Xerophytic Forest in the Western Region of Paraguai”. Sigmae, vol. 8, no. 2, July 2019, pp. 121-7, https://publicacoes.unifal-mg.edu.br/revistas/index.php/sigmae/article/view/942.