G. M. Abdurakhmanov, A. Teymurov, and A. Gadzhiyev, “Biodiversity of Island Ecosystems of the Northern and Middle Caspian and a New Outlook at the Islands Age and the Caspian Sea Level Regime”, Adv Syst Sci Appl, vol. 15, no. 4, pp. 326–337, Dec. 2015.