@misc{indiciae87b42ed3a633,
  title = {Backwrd population projection by a generalized inverse.},
  author = {T N Greville and N Keyfitz},
  year = {1974},
  doi = {10.1016/0040-5809(74)90019-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/4445970/},
  note = {Source identifier: 4445970}
}