- Encyclopedia of Modern Asia: Abacus to China by David Levinson, Karen Christensen, David Levinson
- The Continuum political encyclopedia of the Middle East by Avraham Sela, Avraham Sela :The Azerbaijanis often refer to the part of Azerbaijan north of the Aras River as "north Azerbaijan," while the area south of the river in Iran is referred to by them as south Azerbaijan.
- Brown, Cameron S. 2002 (Dec.). "Observations from Azerbaijan." Middle East Review of International Affairs: v. 6, no. 4, (LINK)