@misc{indiciaeb32326f5818f,
  title = {An effective vacuum cut-off.},
  author = {G W SEARS and E R HOPKE},
  year = {1950},
  doi = {10.1063/1.1745650},
  url = {https://pubmed.ncbi.nlm.nih.gov/15430661/},
  note = {Source identifier: 15430661}
}