@article{harvey2020negbin,
  title={Coronavirus and the Score-driven Negative Binomial Distribution},
  author={Harvey, A. and Lit, R.},
  journal={Time Series Lab - Article Series},
  number={3},
  year={2020},
  publisher={Time Series Lab}
}

MLA:
Harvey, Andrew and Lit, Rutger. "Coronavirus and the Score-driven Negative Binomial Distribution." Time Series Lab - Article Series 3 (2020)

APA:
Harvey, A., & Lit, R. (2020). Coronavirus and the Score-driven Negative Binomial Distribution. Time Series Lab - Article Series, 3

MLA:
HARVEY, Andrew; Lit, Rutger. Coronavirus and the Score-driven Negative Binomial Distribution. Time Series Lab - Article Series 2020, 3