Raghunathan K, Layton JB, Ohnuma T, Shaw AD. Observational research using propensity scores. Adv Chronic Kidney Dis. 2016 Nov;23(6):367-72. doi: 10.1053/j.ackd.2016.11.010
Haleem MS, Han L, van Hemert J, Li B, Fleming A. Retinal area detector from scanning laser ophthalmoscope (SLO) images for diagnosing retinal diseases. IEEE J Biomed Health Inform. 2015 Jul 1;19(4):1472-82. doi: 10.1109/JBHI.2014.2352271
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.
Smith VK, Mansfield CA. Buying time: real and hypothetical offers. J Environ Econ Manage. 1998;36(3):209-24.