@misc{indiciae6350f4e5ed2f,
  title = {Introduction to the social security system.},
  author = {S Ennals},
  year = {1990},
  doi = {10.1136/bmj.301.6765.1386},
  url = {https://pubmed.ncbi.nlm.nih.gov/2271890/},
  note = {Source identifier: 2271890}
}