@misc{indiciae1afb6ca306d5,
  title = {Imaging sunspots using helioseismic methods.},
  author = {C H Tong},
  year = {2005},
  doi = {10.1098/rsta.2005.1647},
  url = {https://pubmed.ncbi.nlm.nih.gov/16286289/},
  note = {Source identifier: 16286289}
}