@article{Caspar1962physical,
  author = {Caspar and Klug},
  title = {Physical Principles in the Construction of Regular Viruses},
  journal = {Cold Spring Harbor Symposia on Quantitative Biology},
  year = {1962},
  doi = {10.1101/SQB.1962.027.001.005},
  url = {https://doi.org/10.1101/SQB.1962.027.001.005}
}

@article{Douglas1998virus,
  author = {Douglas and Young},
  title = {Host–guest encapsulation of materials by assembled virus protein cages},
  journal = {Nature},
  year = {1998},
  doi = {10.1038/30211},
  url = {https://doi.org/10.1038/30211}
}