@misc{indiciae7504095c4b76,
  title = {Describing head shape with surface harmonic expansions.},
  author = {C Purcell and T Mashiko and K Odaka and K Ueno},
  year = {1991},
  doi = {10.1109/10.133214},
  url = {https://pubmed.ncbi.nlm.nih.gov/2066146/},
  note = {Source identifier: 2066146}
}