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.
