@article{2021biostratigraphical,
author={, .. and , ..},
title={Biostratigraphical investigation of calcareous nannofossils: The middle Paleogene to early Neogene strata from the eastern parts of Iran (Median Tethys sea-way)},
journal={Russian Journal of Earth Sciences},
publisher={Геофизический центр Российской Академии Наук},
year={2021},
pages={-},
volume={21},
issue={4},
}