@misc{indiciae6e4d0cb02154,
  title = {Material help.},
  author = {D Erickson},
  year = {1992},
  doi = {10.1038/scientificamerican0892-114},
  url = {https://pubmed.ncbi.nlm.nih.gov/1641618/},
  note = {Source identifier: 1641618}
}