@misc{indiciaefa31d7f5f7f1,
  title = {Relationship between atmospheric CO2 variations and a satellite-derived vegetation index},
  author = {Tucker, C. J. and Fung, I. Y. and Keeling, C. D. and Gammon, R. H.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19860041450},
  note = {Source identifier: 19860041450}
}