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| 1 | Contenau, G., Umma sous la dynastie d'Ur, Paris 1916 |
| 2 | Sollberger, E., The Business and Administrative Correspondence under the Kings of Ur, Texts from Cuneiform Sources 1, Locust Valley 1966. 372 Neo-Sumerian text(s) edited: 94 in Hand copy; 372 in Transliteration; 372 in Translation. |
| 3 | Steinkeller, P., "Corvée Labor in Ur III Times", S. Garfinkle - M. Molina (eds.), From the 21st Century BC to the 21st Century AD. Proceedings of the International Conference on Neo-Sumerian Studies Held in Madrid, July 22-24, 2010, Winona Lake 2013, pp. 347-424 |
| http://oracc.museum.upenn.edu/epsd2/P139554 |
| http://cdli.earth/P139554 |