Gorgan. The southern part of the Caspian Sea was known as the "Sea of Abaskun". See: B.N. Zakhoder (1898–1960). The Caspian Compilation of Records about Eastern
Derbices and the Hyrcanii (Str., 11.9.1, 11.11.8). They are spread toward the Caspian Gates and Rhaga in Media (Ptol., 6.2.6).These western Tapuri could have
extended, along the north, from the Amu Darya (Oxus River) westward to the Caspian Sea and, along the south, from the fringes of the central Iranian deserts
Settlement" in Dr. Brenda Shaffer (ed.), Policy Brief Number 6, Cambridge, MA: Caspian Studies Program, Harvard University, December 2001, Archived copy. [2006-09-01]