Прикаспийская низменность
5- Chingiz Khalifazade, The New Data on the Paleotemperature of Pliocene Basins within the South Caspian Depression, Azerbaijan State Oil Academy, Turkey, 2003, Turkiye jeoloji kurultayi; Bildiri Ozleri Kitabi 63rd, 214, MTA Genel Mudurlugu Kultur Sitesi, Ankara,https://getinfo.de/app/The-New-Data-on-the-Paleotemperature-of-Pliocene/id/BLCP%3ACN076520963 and http://www.jmo.org.tr/resimler/ekler/04e6f2de036648c_ek.pdf