@misc{indiciaeabc303c32bbd,
  title = {An invisible force.},
  author = {Paula R Graling},
  year = {2006},
  doi = {10.1016/s0001-2092(06)00009-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/16881485/},
  note = {Source identifier: 16881485}
}