%0 Journal Article %T Biostratigraphical investigation of calcareous nannofossils: The middle Paleogene to early Neogene strata from the eastern parts of Iran (Median Tethys sea-way) %A Darestani, M.. %A Khazaei, A.. %K Biostratigraphy %J Russian Journal of Earth Sciences %D 2021 %N 21 %P 0 %I Geophysical Center of the Russian Academy of Sciences