@misc{indiciaebf645442ca35,
  title = {Within-session changes in responding during concurrent variable interval variable ratio schedules.},
  author = {F K. McSweeney and E S. Murphy and B P. Kowal},
  year = {2001},
  doi = {10.1016/s0376-6357(01)00179-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/11483354/},
  note = {Source identifier: 11483354}
}