https://www.citypopulation.de/en/world/bymap/Roadways.html

https://www.citypopulation.de/en/world/bymap/Roadways.html

https://www.openpolis.it/come-si-sviluppa-la-rete-stradale-in-italia/

https://www.citypopulation.de/en/world/bymap/Railways.html

https://www.rfi.it/it/rete/la-rete-oggi.html

https://www.siteb.it/wp-content/uploads/rassegna

https://en.wikipedia.org/wiki/List_of_countries_by_Internet_connection_speeds

https://www.citypopulation.de/en/world/bymap/InternetUsers.html

data.worldbank.org/indicator?tab=all

https://www.citypopulation.de/en/world/bymap/TelephoneLines.html

data.worldbank.org/indicator?tab=all

https://www.citypopulation.de/en/world/bymap/MobilePhones.html

data.worldbank.org/indicator?tab=all

https://www.citypopulation.de/en/world/bymap/TelephoneLines.html

data.worldbank.org/indicator?tab=all

https://en.wikipedia.org/wiki/List_of_countries_by_vehicles_per_capita

http://www.aci.it/laci/studi-e-ricerche/dati-e-statistiche/autoritratto/autoritratto-2019.html

data.worldbank.org/indicator?tab=all

https://www.indexmundi.com/map/?v=81000&r=xx&l=it