@misc{indiciae88d7a5012307,
  title = {Sustained attention in hyperactive children.},
  author = {D H Sykes and V I Douglas and G Morgenstern},
  year = {1973},
  doi = {10.1111/j.1469-7610.1973.tb01189.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4750855/},
  note = {Source identifier: 4750855}
}