@misc{indiciae41a632221d96,
  title = {Approximation for age-structured population models using projection methods.},
  author = {T H Barr},
  year = {1991},
  doi = {10.1016/0898-1221(91)90213-n},
  url = {https://pubmed.ncbi.nlm.nih.gov/12284707/},
  note = {Source identifier: 12284707}
}