@misc{indiciaeb48c197d68d1,
  title = {Extrapolation through hierarchical levels.},
  author = {H A De Kruijf},
  year = {1991},
  doi = {10.1016/0742-8413(91)90171-o},
  url = {https://pubmed.ncbi.nlm.nih.gov/1677865/},
  note = {Source identifier: 1677865}
}