1. Akhmetiev, M.A., Flora of the Zaisan depression at the Eocene-Oligocene boundary, Izv. Akad. Nauk SSSR. Ser. Geol., 1985, no.11, pp. 76–85.
2. Akhmetiev, M.A., Lopatin, A.V., Sytchevskaya, E.K., and Popov, S.V., Biogeography of the Northern Peri-Tethys from the Late Eocene to the Early Miocene: Part 4. Late Oligocene–Early Miocene: Terrestrial biogeography, conclusions, Paleontol. J., 2005, vol. 39, no. 1, pp. S1–S54.
3. Argan, E., Tektonika Azii (Tectonics of Asia), Moscow–Leningrad: ONTI, 1935 [in Russian].
4. Baishashov, B.U., Meldebekov, A.M., and Abdrakhmanova, L.T., The history of paleontological investigations of the Cenozoic deposits of the Zaisan depression, Izv. NAN Resp. Kazakhstan. Ser. Biol. Med., 2016, no. 2, pp. 5–13.
5. Borisov, B.A., Stratigraphy of Lower-Middle Eocene deposits of the Zaisan depression, in Flora i fauna Zaisanskoi vpadiny (Flora and Fauna of the Zaisan Depression), Tbilisi: Metsniereba, 1984, pp. 142–180.