@article{mathematicalmodelsofcovid19spread,
  title = {Mathematical models of COVID-19 spread},
  author = {O. I. Krivorotko and S. I. Kabanikhin},
  year = {2021},
  eprint = {2112.05315},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2112.05315v2},
}