I found this:
Smith, H.S, "The Making of Egypt: A Review of the Influence of Susa and Sumer on Upper Egypt and Lower Nubia in the 4th Millennium B.C
." in The Followers of Horus: Studies Dedicated to Michael Allen Hoffman
. pp. 235-246. edited by RenŽe Friedman and Barbara Adams. Oxbow Books, 1992.
- Comparison of the iconography of Susa (Persia) and Sumer with Predynastic Egypt. Argues for contact with Persian Gulf and Upper Egypt via Red Sea route. Compare to von der Way in same volume.