Woods, Christopher (2010), The earliest Mesopotamian writingArchivované 2021-08-26 na Wayback Machine (PDF), in Woods, Christopher (ed.), Visible language. Inventions of writing in the ancient Middle East and beyond, Oriental Institute Museum Publications, vol. 32, Chicago: University of Chicago, pp. 33–50, ISBN 978-1-885923-76-9
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Woods, Christopher (2010), The earliest Mesopotamian writingArchivované 2021-08-26 na Wayback Machine (PDF), in Woods, Christopher (ed.), Visible language. Inventions of writing in the ancient Middle East and beyond, Oriental Institute Museum Publications, vol. 32, Chicago: University of Chicago, pp. 33–50, ISBN 978-1-885923-76-9