>>> https://www.youtube.com/watch?v=zf7C5DiEVpA
>>> https://www.teknoring.com/news/infrastrutture/stretto-di-messina-un-tunnel-subalveo-in-alternativa-al-ponte/
>>> https://www.autostrade.it/it/tunnelsubportualedigenova
>>> https://www.autostrade.it/it/comunicazione-e-media/comunicati-stampa-corporate/-/bulletin/view/77015d9e-56b4-4932-bce8-40a0fd602afd
>>> https://www.cdt.ch/news/mondo/ecco-il-tunnel-sottomarino-di-genova-e-il-piu-grande-in-europa-per-diametro-344732