González Gómez, , Manuel, and Xerardo Pereiro,. “Synergies Between Low Cost Air Connections in Porto and Visitors and Pilgrims to Galicia”. Revista Galega de Economía 30 (September 20, 2021): 1-19. Accessed April 19, 2024. https://revistas.usc.gal/index.php/rge/article/view/7356.