@misc{indiciae03e06fa2b7fd,
  title = {Sustained performance during very long experimental sessions.},
  author = {B F Skinner and W H Morse},
  year = {1958},
  doi = {10.1901/jeab.1958.1-235},
  url = {https://pubmed.ncbi.nlm.nih.gov/16811224/},
  note = {Source identifier: 16811224}
}