@misc{indiciaeae86c2ccc204,
  title = {Sequential constraints in letter lists.},
  author = {M J Howe},
  year = {1968},
  doi = {10.2466/pms.1968.27.1.231},
  url = {https://pubmed.ncbi.nlm.nih.gov/5685698/},
  note = {Source identifier: 5685698}
}