@misc{indiciaef2609f0c1a6e,
  title = {Acoustic beams with angular momentum.},
  author = {John Lekner},
  year = {2006},
  doi = {10.1121/1.2360420},
  url = {https://pubmed.ncbi.nlm.nih.gov/17225377/},
  note = {Source identifier: 17225377}
}