Silva, Ellen Cristina Vale, and Khey Albert de Azevedo Fontes. “Aquatic Macrophytes from Northeastern Maranhão: Floristic Survey and Identification Key”. Boletim Do Museu Paraense Emílio Goeldi - Ciências Naturais, vol. 13, no. 3, Dec. 2018, pp. 355-6, https://doi.org/10.46357/bcnaturais.v13i3.342.