@misc{indiciae465dd4de8208,
  title = {Play and exploration.},
  author = {J Burn},
  year = {1967},
  doi = {10.1111/j.1469-8749.1967.tb02280.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/6035581/},
  note = {Source identifier: 6035581}
}