@misc{indiciae575b8d63882d,
  title = {Mental arithmetic: effects of calculation procedure and problem difficulty on solution latency.},
  author = {G Wolters and M Beishuizen and G Broers and W Knoppert},
  year = {1990},
  doi = {10.1016/0022-0965(90)90047-c},
  url = {https://pubmed.ncbi.nlm.nih.gov/2303775/},
  note = {Source identifier: 2303775}
}