B. van Koppen, Smits, S., Moriarty, P. B., F. de Vries, P., Mikhail, M., Boelee, E., Reyes, M., Reyes, B., Dominguez, I. C., Restrepo, I., McIntyre, P., y Graaf, deS.,
Ascendiendo la escala del agua. The Hague, The Netherlands: IRC and IWMI, 2010, p. 232.