@article{Varentsov2003the,
author={Varentsov, I.M. and Muzyliov, N.G. and Nikolaev, V.G. and Stupin, S.I.},
title={The origin of black shale-hosted Mn deposits  in Paratethyan basins: Constraints from geological events at the Eocene/Oligocene boundary},
journal={Russian Journal of Earth Sciences},
publisher={Geophysical Center of the Russian Academy of Sciences},
year={2003},
pages={255-272},
volume={5},
issue={4},
}