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| 1 | Legrain, L., Business Documents of the Third Dynasty of Ur, Ur Excavations Texts 3, London 1937 |
| 2 | Zarins, J., The Domestication of Equidae in Third-Millennium BCE Mesopotamia, Cornell University Studies in Assyriology and Sumerology 24, Bethesda 2014 |
| http://www.britishmuseum.org/collection/search?museum_number=130468 |
| http://cdli.earth/P137857 |
| http://www.ur-online.org/subject/13767/ |
| http://oracc.museum.upenn.edu/epsd2/P137857 |
| http://www.ebl.lmu.de/library/BM.130468 |