@misc{indiciaead77670ad1a1,
  title = {A note on difference-delay equations.},
  author = {S A Levin and R M May},
  year = {1976},
  doi = {10.1016/0040-5809(76)90043-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/1273798/},
  note = {Source identifier: 1273798}
}