Valtin, Heinz; Gorman, Sheila A. (2012). «Drink at least eight glasses of water a day: Really? Is there scientific evidence for "8 × 8"?». American Journal of Physiology. Regulatory, Integrative and Comparative Physiology283 (5): R993-R1004. PMID12376390. doi:10.1152/ajpregu.00365.2002.
Valtin, Heinz; Gorman, Sheila A. (2012). «Drink at least eight glasses of water a day: Really? Is there scientific evidence for "8 × 8"?». American Journal of Physiology. Regulatory, Integrative and Comparative Physiology283 (5): R993-R1004. PMID12376390. doi:10.1152/ajpregu.00365.2002.
Hanson, David. «Ancient Period». History of Alcohol and Drinking around the World. State University of New York. Archivado desde el original el 19 de febrero de 2014. Consultado el 4 de diciembre de 2014.
Hanson, David. «Ancient Period». History of Alcohol and Drinking around the World. State University of New York. Archivado desde el original el 19 de febrero de 2014. Consultado el 4 de diciembre de 2014.