@misc{indiciae8bc904edd65a,
  title = {Population regulation of the purple sea urchin, Strongylocentritus purpuratus, at the California Channel Islands},
  author = {K. D. Lafferty and D. Kushner},
  year = {2000},
  url = {https://pubs.usgs.gov/publication/2002228},
  note = {Source identifier: 2002228}
}