@misc{indiciaea1e09e08c64c,
  title = {Preference for fixed-interval schedules: effects of initial-link length.},
  author = {G R Wardlaw and M C Davison},
  year = {1974},
  doi = {10.1901/jeab.1974.21-331},
  url = {https://pubmed.ncbi.nlm.nih.gov/16811747/},
  note = {Source identifier: 16811747}
}