@misc{indiciae74ce7fcf3be3,
  title = {Problem solving set in different age groups.},
  author = {H J HEGLIN},
  year = {1956},
  doi = {10.1093/geronj/11.3.310},
  url = {https://pubmed.ncbi.nlm.nih.gov/13332226/},
  note = {Source identifier: 13332226}
}