@misc{indiciae4bad9acebe0f,
  title = {Population dynamics in a periodically varying environment.},
  author = {R M Nisbet and W S Gurney},
  year = {1976},
  doi = {10.1016/s0022-5193(76)80086-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/1271830/},
  note = {Source identifier: 1271830}
}