@misc{indiciae05b3cf187022,
  title = {Group purchasing as a marketing tool.},
  author = {R Penrose},
  year = {1988},
  doi = {10.1300/j273v02n02\_10},
  url = {https://pubmed.ncbi.nlm.nih.gov/10294003/},
  note = {Source identifier: 10294003}
}