"Itália - Zona Ambiental de Milão Ecopass"(PDF) (in Portuguese). Associação Nacional de Transportadores Públicos Rodoviários de Mercadorias. 22 January 2008. Archived from the original(PDF) on 31 March 2010. Retrieved 17 February 2009.
Alessandro Balducci; et al. (March 2008). "Country Case Study: Italy – WP 8"(PDF). Milan Polytechnic Dipartimento di architettura e pianificazione. Retrieved 24 February 2009. pp. 4. For a complete account of the process see Part II, The ECOPASS-First Storyline.
"Itália - Zona Ambiental de Milão Ecopass"(PDF) (in Portuguese). Associação Nacional de Transportadores Públicos Rodoviários de Mercadorias. 22 January 2008. Archived from the original(PDF) on 31 March 2010. Retrieved 17 February 2009.