W. Checkley, Gilman, R. H., Black, R. E., Epstein, L. D., Cabrera, L., Sterling, C. R., and Moulton, L.,
“Effect of water and sanitation on childhood health in a poor Peruvian peri-urban community”,
The lancet, pp. p. 112-118 : 3 fig., 6 tab., 2004.
