@misc{indiciae9283b708f53f,
  title = {Reduction of structured population models to threshold-type delay equations and functional differential equations: a case study.},
  author = {H L Smith},
  year = {1993},
  doi = {10.1016/0025-5564(93)90006-v},
  url = {https://pubmed.ncbi.nlm.nih.gov/8431644/},
  note = {Source identifier: 8431644}
}