@misc{indiciae1943bca5f641,
  title = {A model for studying birth rates given time dependent changes in reproductive parameters.},
  author = {M C Sheps and J A Menken},
  year = {1971},
  url = {https://pubmed.ncbi.nlm.nih.gov/5130168/},
  note = {Source identifier: 5130168}
}