@misc{indiciae9761dfebd659,
  title = {On the length-difficulty relation in skill performance.},
  author = {J Swink and D Trumbo and M Noble},
  year = {1967},
  doi = {10.1037/h0024705},
  url = {https://pubmed.ncbi.nlm.nih.gov/6052613/},
  note = {Source identifier: 6052613}
}