@misc{indiciae2b87465862d7,
  title = {Systems approach.},
  author = {A M Testa},
  doi = {10.1111/j.1552-6909.1982.tb01013.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/6918603/},
  note = {Source identifier: 6918603}
}