Snodgrass, Anthony M. (2001). The Dark Age of Greece. New York: Routledge. str. 102. ISBN0415936357. See also Popham, Sackett, Excavations at Lefkandi, Euboea 1968
The diffusion of protogemetric pottery is a complex subject best summerized by V. Desborough, Protogeometric Pottery, 1952. The picture is further complicated with the presence of a lingering sub-Mycenaean style in some Greek centres during this period, see Desborough (1964). The Last Mycenaeans and their Successors: An Archaeological Survey, c. 1200 - c. 1000 B.C.
