Peixoto, Paulo Henrique Pereira, et al. “Fluoride Effects on Leaves of Aquatic Salvinia Auriculata”. Pesquisa Agropecuaria Brasileira, vol. 40, no. 8, Aug. 2005, pp. 727-32, https://doi.org/10.1590/S1678-3921.pab2005.v40.7019.