@misc{indiciae46bd85ca8fe2,
  title = {An inexpensive activity measuring device for small animals.},
  author = {O D Murphree and J B Johnson},
  year = {1974},
  doi = {10.1007/bf03000574},
  url = {https://pubmed.ncbi.nlm.nih.gov/4850552/},
  note = {Source identifier: 4850552}
}