Sánchez-Arcediano, S., y F. Babinger. «Covid-19 Infection Reduction Measures As a Safety Certification in the Spanish Tourism Sector». Revista De Estudios Andaluces, n.º 44, julio de 2022, pp. 238-40, https://revistascientificas.us.es/index.php/REA/article/view/21559.