@misc{indiciaecbd2f5e63dd4,
  title = {Where is the sun?},
  author = {J Sun and P Perona},
  year = {1998},
  doi = {10.1038/630},
  url = {https://pubmed.ncbi.nlm.nih.gov/10195141/},
  note = {Source identifier: 10195141}
}