solved bibliography Nissen, H.-J. 1988 The Early History of the Ancient

bibliography
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Smith, M.
2009 “V. Gordon Childe and the Urban Revolution: a Historical Perspective on a Revolution in Urban Studies.” Town Planning Review 80: 3-29.
Algaze, G.
2001 The Prehistory of Imperialism: The case of Uruk Period Mesopotamia. In M. Rothmann, ed. Uruk Mesopotamia and its Neighbors: Cross-cultural Interactions and their Consequences in the Era of State Formation. Edited by M. Rothman. Santa Fe: School of American Research. Pp. 27-85.
2012 “The End of Prehistory and The Uruk Period.” In The Sumerian World, edited by Harriet Crawford. London: Routledge. Pp. 68-94.