Giergiczny M, Dekker T, Hess S, Chintakayala P. Testing the stability of utility parameters in repeated best, repeated best-worst and one-off best-worst studies. Eur J Trans Infra. 2017 Sep 1;17(4):457-76. doi: 10.18757/ejtir.2017.17.4.3209
Kim D, Lauria DT, Poulos C, Dong B, Whittington D. Effect of travel distance on household demand for typhoid vaccines: implications for planning. Int J Health Plann Manage. 2013 Mar 12;Advance Online.