@misc{indiciae12232b45ad16,
  title = {Evolution of CAM and C 4 carbon-concentrating mechanisms},
  author = {Jon E. Keeley and Philip W. Rundel},
  year = {2003},
  doi = {10.1086/374192},
  url = {https://pubs.usgs.gov/publication/1008348},
  note = {Source identifier: 1008348}
}