@misc{indiciae83ac5457ed8f,
  title = {Light-emitting diodes as a radiation source for plants},
  author = {Bula, R. J. and Morrow, R. C. and Tibbitts, T. W. and Barta, D. J. and Ignatius, R. W. and Martin, T. S.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/20040090327},
  note = {Source identifier: 20040090327}
}