1. Association of American Railroads, "Freight Rail Hazmat & Tank Car Regulations" https://www.aar.org/article/freight-rail-hazmat-regulations.
2. Jessica Murphy, "Lac-Megantic: The runaway train that destroyed a town", https://www.bbc.com/news/world-us-canada-42548824, By BBC News, Toronto, 19 January 2018.
3. https://www.law.cornell.edu/cfr/text/49/179.202-13, Cornel Law School, Legal Information Institute, Open Access to Law since 1992.
4. https://www.law.cornell.edu/cfr/text/49/179.18, Cornel Law School, Legal Information Institute, Open Access to Law since 1992.