@misc{indiciaec314b9319f70,
  title = {Gross margin. Return on investment.},
  author = {B A Berger},
  year = {1986},
  doi = {10.1016/s0160-3450(16)33042-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/3776828/},
  note = {Source identifier: 3776828}
}