Smith V, Mansfield CA, Clayton (Trantham) L. Valuing a homeland security policy: countermeasures for the threats from shoulder mounted missiles. J Risk Uncertain. 2009;38(3):215-43.
Watson V, Ryan M. Exploring preference anomalies in double bounded contingent valuation. J Health Econ. 2007 May 1;26(3):463-82. doi: 10.1016/j.jhealeco.2006.10.009