1. PIARC, Report to the XXth World Road Congress, Montreal (Canada-Québec), PIARC Committee on Road Tunnels, report 20.05. B, 1995.
2. PIARC, Fire and Smoke Control in Road Tunnels, PIARC Committee on Road Tunnels Operation (C5), report 05.05. B-1999, ISBN: 2-84060-064-1, 1999.
3. PIARC, Systems and Equipment for Fire and Smoke Control, PIARC Committee on Road Tunnels Operation (C3.3), report 05.16. B-2006, ISBN: 2-84060-175-3, 2007.
4. PIARC, Operational Strategies for Emergency Ventilation, PIARC Committee on Road Tunnels Operation (C3.3), report 2011-R02, ISBN: 2-84060-234-2, 2011.
5. European Commission, Directive 2004/54/EC of the European Parliament and of the Council on Minimum Safety Requirements for Tunnels in the Trans European Road Network, 29th April 2004.