Sandín, B., P. Chorot, J. García-Escalera, and R. M. Valiente. “Emotional Impact of the COVID-19 Pandemic during the Spanish National Lockdown: Protective and Risk/Vulnerability Factors”. Acción Psicológica, vol. 18, no. 1, June 2021, pp. 27–44, doi:10.5944/ap.18.1.29520.