Hanna Zimnitskaya, James von Geldern. Is the Caspian Sea a sea; and why does it matter?. Journal of Eurasian Studies. 2 (1): 1–14. ISSN 1879-3665 (анг.)
I.S. Zonn, A.N. Kosarev, M. Glantz, A.G. Kostianoy. The Caspian Sea Encyclopedia. Encyclopedia of Seas. Springer Berlin Heidelberg. p. 290. 2010. ISBN 978-3-642-11524-0 (анг.)
Henri J. Dumont, Tamara A. Shiganova, Ulrich Niermann. Aquatic Invasions in the Black, Caspian, and Mediterranean Seas. Springer. 2004. ISBN 978-1-4020-1869-5 (анг.)
H.J. Dumont. The Caspian Lake: History, biota, structure, and function. Limnology and Oceanography. 43 (1): 44–52. 2003. ISSN 0024-3590 (анг.)
A.G. Kostianoi, A. Kosarev. The Caspian Sea Environment. Birkhäuser. 2005. ISBN 978-3-540-28281-5 (анг.)