@misc{indiciae468659043ebb,
  title = {Periodic solutions for a population dynamics problem with age-dependence and spatial structure.},
  author = {M Kubo and M Langlais},
  year = {1991},
  doi = {10.1007/bf00167157},
  url = {https://pubmed.ncbi.nlm.nih.gov/2061697/},
  note = {Source identifier: 2061697}
}