@misc{indiciae31f9639846e4,
  title = {Serial pattern complexity: irregularity and hierarchy.},
  author = {P A van der Helm and R J van Lier and E L Leeuwenberg},
  year = {1992},
  url = {https://pubmed.ncbi.nlm.nih.gov/1437468/},
  note = {Source identifier: 1437468}
}