@misc{indiciae12d2b0656f8a,
  title = {Functions of hints in individual problem-solving.},
  author = {R J Burke and N R Maier and L R Hoffman},
  year = {1966},
  url = {https://pubmed.ncbi.nlm.nih.gov/5968475/},
  note = {Source identifier: 5968475}
}