@misc{indiciae736dcb18944d,
  title = {Gapped gapless packing structures.},
  author = {J M Beck and V A Volpert},
  year = {2003},
  doi = {10.1016/s0021-9797(02)00217-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/16256592/},
  note = {Source identifier: 16256592}
}