@Article{HessBierPola05,
author = {Stephane Hess and Michel Bierlaire and John Polak },
title = {Estimation of value of travel-time savings using Mixed Logit models},
journal = {Transportation Research Part A: Policy and Practice},
volume = {39},
number = {3},
pages = {221-236},
doi = {10.1016/j.tra.2004.09.007},
year = {2005}
}