@misc{indiciaedcc0f2da0800,
  title = {Simple summary calculations.},
  author = {J S Bulman and J F Osborn},
  year = {1989},
  doi = {10.1038/sj.bdj.4806727},
  url = {https://pubmed.ncbi.nlm.nih.gov/2920120/},
  note = {Source identifier: 2920120}
}