@misc{indiciaef7735a1e1d18,
  title = {The development of numerical understanding.},
  author = {R S Siegler and M Robinson},
  year = {1982},
  doi = {10.1016/s0065-2407(08)60072-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/7090905/},
  note = {Source identifier: 7090905}
}