Cotler, H. A., Gutierrez, S. D., Enriquez, C. G. and Garrido, A. P. (2005) “The evaluation of soil erosion off-sites effects in large basins: the studycase of Lerma-Chapaça watershed, Mexico”, Sociedade & Natureza, 1(1). doi: 10.14393/SN-v1-2005-9738.