@misc{indiciae85a406b244d6,
  title = {Persistence in discrete age-structured population models.},
  author = {J Li},
  year = {1988},
  doi = {10.1007/bf02459705},
  url = {https://pubmed.ncbi.nlm.nih.gov/3219444/},
  note = {Source identifier: 3219444}
}