Pallares-Barbera, M. & Vera, A., 2021. Així és com la COVID-19 ha afectat el comerç exterior. This is how COVID-19 has affected foreign trade in Catalonia. In La nova geografía de la Catalunya postcovid. The new geography of post-COVID in Catalonia. Barcelona. Barcelona: Societat Catalana de Geografia. Geographical Catalan Society, pp. 205-220.