@misc{indiciae498544867f9f,
  title = {The effects of unavoidable shocks on a multiple schedule having an avoidance component.},
  author = {M B WALLER and P F WALLER},
  year = {1963},
  doi = {10.1901/jeab.1963.6-29},
  url = {https://pubmed.ncbi.nlm.nih.gov/13998594/},
  note = {Source identifier: 13998594}
}