1. Anderson, M., Mckee, M., & Mossialos, E. (2020). COVID-19 exposes weaknesses in European response to outbreaks. BMJ, 368(1). https://doi.org/10.1136/bmj.m1075
2. Bejan, R. (2020). COVID-19 and disposable migrant workers. Verfassungsblog, April 16. Retrieved April 20, 2022, from https://verfassungsblog.de/COVID-19-and-disposable-migrant-workers
3. Carrera, S., & Chun Luk, N. (2020). In the name of COVID-19: An assessment of the Schengen internal border controls and travel restrictions in the EU. Policy Department for Citizens’ Rights and Constitutional Affairs, Directorate-General for Internal Policies. Retrieved May 20, 2022, from https://www.europarl.europa.eu/RegData/etudes/STUD/2020/659506/IPOL_STU(2020)659506_EN.pdf
4. Davies, G. T. (2020). Does evidence-based EU law survive the COVID-19 pandemic? Considering the status in EU law of lockdown measures which affect Free Movement. Frontiers in Human Dynamics, 2(584486). https://doi.org/10.3389/fhumd.2020.584486
5. Eckardt, M., Kappner, K., & Wolf, N. (2020). COVID-19 across European regions: The role of border controls. Elsevier.