1. Australian Government Department of Health (2020, August). https://www.health.gov.au/sites/default/files/documents/2020/06/3-step-framework-for-a-covidsafe-australia-3-step-framework-for-a-covidsafe-australia_2.pdf.
2. Centers for Disease Control and Prevention (2020, August). Preparing k-12 school administrators for a safe return to school in fall 2020. https://www.cdc.gov/coronavirus/2019-ncov/community/schools-childcare/prepare-safe-return.html.
3. Evaluating Classical Airplane Boarding Methods Considering COVID-19 Flying Restrictions