@article{randomcohorteffectsandagegroups,
  title = {Random cohort effects and age groups dependency structure for mortality modelling and forecasting: Mixed-effects time-series model approach},
  author = {Ka Kin Lam and Bo wang},
  year = {2021},
  eprint = {2112.15258},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2112.15258v1},
}