@misc{indiciae0b92e41b6edf,
  title = {Directional forces.},
  author = {L L Merrifield and J J Cross},
  year = {1970},
  doi = {10.1016/0002-9416(70)90164-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/5265828/},
  note = {Source identifier: 5265828}
}