IETRI, D.; ROTA, F. S. The Geography Of European Urban Networks. The Participation In Research And Technological Development Projects. Bollettino della Società Geografica Italiana, [S. l.], p. 345–366, 2008. DOI: 10.36253/bsgi-7184. Disponível em: https://www.bsgi.it/index.php/bsgi/article/view/7184. Acesso em: 7 oct. 2026.