Analysis of information sources in references of the Wikipedia article "Molino hidráulico" in Spanish language version.
Wikander, Örjan (2000). Handbook of Ancient Water Technology (Technology and Change in History) (en inglés). Leiden: Brill. ISBN 90-04-11123-9.This is also the period when water-mills started to spread outside the former Empire. According to Cedrenus (Historiarum compendium), a certain Metrodoros who went to India in c. AD 325 "constructed water-mills and baths, unknown among them [the Brahmans] till then".