1. Applegate, W. B., & Ouslander, J. G. (2020). COVID-19 Presents high risk to older persons. Journal of the American Geriatrics Society, 68(4), 681. https://doi.org/10.1111/jgs.16426.
2. Bischof, J. M., & Airoldi, E. M. (2012). Summarizing Topical Content with Word Frequency and Exclusivity. In Proceedings of the 29th international conference on international conference on machine learning (pp. 9–16). http://dl.acm.org/citation.cfm?id=3042573.3042578.
3. Blei, D. M., Ng, A. Y., & Jordan, M. I. (2003). Latent Dirichlet allocation. Journal of Machine Learning Research, 3, 993–1022.
4. Chen, Q., Liang, M., Li, Y., Guo, J., Fei, D., Wang, L., et al. (2020). Mental health care for medical staff in China during the COVID-19 outbreak. The Lancet Psychiatry, 7(4), e15–e16. https://doi.org/10.1016/S2215-0366(20)30078-X.
5. CityNews. (2020). Trudeau announces $1.1B for COVID-19 research, vaccine work. https://www.citynews1130.com/2020/04/23/trudeau-announces-1-1b-for-covid-19-research-vaccine-work/