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2. Staples, J.M., Gamradt, L., Stein, O., and Shi, X.: ‘Recommendations for winter traction materials management on roadways adjacent to bodies of water’, (, Montana Department of Transportation 2004)
3. Available at: http://www.saltinstitute.org/30.html, accessed May 2010
4. FHWA: ‘Corrosion costs and preventative strategies in the United States’. Federal Highway Administration, Publication No. FHWA-RD-01-156, 2002
5. ‘Guidelines for the selection of snow and ice control materials to mitigate environmental impacts’, 2007