@misc{indiciae3c24d3763829,
  title = {Portable board for roller skating exercises.},
  author = {M W DEMPSEY},
  year = {1958},
  doi = {10.1093/ptj/38.6.420},
  url = {https://pubmed.ncbi.nlm.nih.gov/13567017/},
  note = {Source identifier: 13567017}
}