@misc{indiciaebaec78bcd31b,
  title = {A scheme for the future.},
  author = {C Smit Sibinga},
  year = {1984},
  doi = {10.1111/j.1600-0609.1984.tb02614.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/6433477/},
  note = {Source identifier: 6433477}
}