@misc{indiciae6bee459fb65a,
  title = {Population diversity: its extent and extinction.},
  author = {J B Hughes and G C Daily and P R Ehrlich},
  year = {1997},
  doi = {10.1126/science.278.5338.689},
  url = {https://pubmed.ncbi.nlm.nih.gov/9381179/},
  note = {Source identifier: 9381179}
}