@misc{indiciaea83eaa273abf,
  title = {Secondary reinforcement as a function of the interstimulus interval: a confutation.},
  author = {R L Coberly and J B Long},
  year = {1967},
  doi = {10.2466/pr0.1967.21.3.929},
  url = {https://pubmed.ncbi.nlm.nih.gov/6079666/},
  note = {Source identifier: 6079666}
}