@article{Rybkina2017new,
author={Rybkina, A.. and Rostovtseva, Y..},
title={New evidence of the age of the Black Sea Pontian substage},
journal={Russian Journal of Earth Sciences},
publisher={Geophysical Center of the Russian Academy of Sciences},
year={2017},
pages={1-4},
volume={17},
issue={5},
}