Akhmetiev, M. A.; Lopatin, A. V.; Sytchevskaya, E. K.; Popov, S. V. (2005). Biogeography of the northern Peri-Tethys from the Late Eocene to the Early Miocene: Part 4. Late Oligocene–Early Miocene: terrestrial biogeography, conclusions. Paleontological Journal. 39, Suppl. 1: S1-S54.
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Akhmetiev, M. A.; Lopatin, A. V.; Sytchevskaya, E. K.; Popov, S. V.
2005
Biogeography of the northern Peri-Tethys from the Late Eocene to the Early Miocene: Part 4. Late Oligocene–Early Miocene: terrestrial biogeography, conclusions