@misc{indiciae5b304edc1333,
  title = {Structure-activity relations and beta-lactamase resistance.},
  author = {C H O'Callaghan},
  year = {1980},
  doi = {10.1098/rstb.1980.0038},
  url = {https://pubmed.ncbi.nlm.nih.gov/6109316/},
  note = {Source identifier: 6109316}
}