Ashraf M, Shokrollahi S, Pisig AU, Sampani K, Abdelal O, Cavallerano JD, Robertson G, Fleming A, van Hemert J, Pitoc CM, Sun JK, Aiello LP, Silva PS. Retinal vascular caliber association with nonperfusion and diabetic retinopathy severity depends on vascular caliber measurement location. Ophthalmol Retina. 2021 Jun;5(6):571-9. doi: 10.1016/j.oret.2020.09.003
Wardman M, Chintakayala PK, de Jong G. Values of travel time in Europe: review and meta-analysis. Transp Res Part A Policy Pract. 2016 Dec;94:93-111. doi: 10.1016/j.tra.2016.08.019
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.