@misc{indiciaeb8b7b6cf9566,
  title = {Establishing mirror-image discriminations with progressively delayed extra-stimulus prompts.},
  author = {P M Smeets and G E Lancioni and S Striefel},
  year = {1991},
  doi = {10.1016/0022-0965(91)90059-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/1774548/},
  note = {Source identifier: 1774548}
}