@misc{indiciaeb177bc8d045c,
  title = {Past and future are present.},
  author = {M F Collen},
  year = {1983},
  doi = {10.1007/bf00993279},
  url = {https://pubmed.ncbi.nlm.nih.gov/6619685/},
  note = {Source identifier: 6619685}
}