Jimenez-Murcia S, Granero R, Fernandez-Aranda F, Arcelus J, Aymami MN, Gomez-Pena M, Tarrega S, Moragas L, del Pino-Gutierrez A, Sauchelli S, Fagundo AB, Brewin N, Menchon JM. Predictors of outcome among pathological gamblers receiving cognitive behavioral group therapy. Eur Addict Res. 2015;21(4):169-78. doi: 10.1159/000369528
Phanikumar CV, Maitra B. Willingness-to-pay and preference heterogeneity for rural bus attributes. J Transp Eng A-Syst. 2007 Jan;133(1).