@misc{indiciaecfa569b86f2e,
  title = {Stable controls in age-dependent population dynamics.},
  author = {J H Swart},
  year = {1989},
  doi = {10.1016/0025-5564(89)90051-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/2520177/},
  note = {Source identifier: 2520177}
}