@misc{indiciae2602670ce221,
  title = {Individual differences in cognitive arithmetic.},
  author = {D C Geary and K F Widaman},
  year = {1987},
  doi = {10.1037//0096-3445.116.2.154},
  url = {https://pubmed.ncbi.nlm.nih.gov/2955071/},
  note = {Source identifier: 2955071}
}