@misc{indiciae56e39d18671e,
  title = {Learning, a theoretical perspective.},
  author = {G Berkson},
  year = {1973},
  doi = {10.1016/s0031-3955(16)32879-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/4723625/},
  note = {Source identifier: 4723625}
}