Camargo, J. A., and A. Jiménez. “Ecological Responses of Epilithic Diatoms and Aquatic Macrophytes to Fish Farm Pollution in a Spanish River”. Anales Del Jardín Botánico De Madrid, vol. 64, no. 2, Dec. 2007, pp. 213-9, doi:10.3989/ajbm.2007.v64.i2.177.