@misc{indiciae2e91d1aec016,
  title = {An improved approximation for the Rayleigh wave equation.},
  author = {Daniel Royer and Dominique Clorennec},
  year = {2006},
  doi = {10.1016/j.ultras.2006.09.006},
  url = {https://pubmed.ncbi.nlm.nih.gov/17098270/},
  note = {Source identifier: 17098270}
}