Anette Schomberg, «The Karnak Clepsydra and its Successors: Egypt’s Contribution to the Invention of Time Measurement», in: Jonas Berking (a cura di), Water Management in Ancient Civilizations, Berlin: Edition Topoi, 2018, 321–346. pdfArchiviato il 29 novembre 2020 in Internet Archive.
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Anette Schomberg, «The Karnak Clepsydra and its Successors: Egypt’s Contribution to the Invention of Time Measurement», in: Jonas Berking (a cura di), Water Management in Ancient Civilizations, Berlin: Edition Topoi, 2018, 321–346. pdfArchiviato il 29 novembre 2020 in Internet Archive.