Evans MF, Poulos C, Smith VK. Who counts in evaluating the effects of air pollution policies on households? Non-market valuation in the presence of dependencies. J Environ Econ Manage. 2011 Jul 1;62(1):65-79.
Fleming A, Goatman KA, Sharp PF, Styles CJ, Wikes WN, Olson JA. A large scale validation of automated grading. Eur J Ophthalmol. 2009 May 1;19(3):504.
Smith VK, Mansfield CA. Buying time: real and hypothetical offers. J Environ Econ Manage. 1998;36(3):209-24.