@misc{indiciae79bb35d35c21,
  title = {Certification? Direction essential.},
  author = {B Thomas},
  year = {1972},
  doi = {10.1016/s0001-2092(07)61957-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/4482880/},
  note = {Source identifier: 4482880}
}