Popov, S. V.; Akhmetiev, M. A.; Bugrova, E. M.; Lopatin, A. V.; Amitrov, O. V.; Andreyeva-Grigorovich, A. S.; Zaporozhets, N. I.; Zherikhin, V. V.; Krasheninnikov, V. A.; Nikolaeva, I. A.; Sytchevskaya, E. K. (2002). Biogeography of the Northern Peri-Tethys from the Late Eocene to the Early Miocene: Part 2. Early Oligocene. Paleontological Journal. 36 Suppl. 3: S185–S259.
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Popov, S. V.; Akhmetiev, M. A.; Bugrova, E. M.; Lopatin, A. V.; Amitrov, O. V.; Andreyeva-Grigorovich, A. S.; Zaporozhets, N. I.; Zherikhin, V. V.; Krasheninnikov, V. A.; Nikolaeva, I. A.; Sytchevskaya, E. K.
2002
Biogeography of the Northern Peri-Tethys from the Late Eocene to the Early Miocene: Part 2. Early Oligocene