@misc{indiciae20fd3057bc1f,
  title = {Proceedings: Threshold-dependent phenomena in photomorphogenic processes.},
  author = {J A De Greef and R Caubergs},
  year = {1974},
  url = {https://pubmed.ncbi.nlm.nih.gov/4141465/},
  note = {Source identifier: 4141465}
}