“Biological interactions in the co-occurrence of Eichhornia azurea and free-floating macrophytes - DOI: 10.4025/actascibiolsci.v31i4.5577” (2009) Acta Scientiarum. Biological Sciences, 31(4), p. 355–361. doi:10.4025/actascibiolsci.v31i4.5577.