@misc{indiciaed9c18bee46fc,
  title = {Colour coded Doppler systems.},
  author = {D N White},
  year = {1987},
  doi = {10.1016/0301-5629(87)90122-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/3296375/},
  note = {Source identifier: 3296375}
}