@misc{indiciae9bc2aa8b44ca,
  title = {Shelf and open-ocean calcareous phytoplankton assemblages across the Paleocene-Eocene thermal maximum: Implications for global productivity gradients},
  author = {S.J. Gibbs and T.J. Bralower and Paul R. Bown and J.C. Zachos and L. M. Bybell},
  year = {2006},
  doi = {10.1130/g22381.1},
  url = {https://pubs.usgs.gov/publication/70030249},
  note = {Source identifier: 70030249}
}