@InProceedings{HessPolaBier05,
author = {Stephane Hess and John Polak and Michel Bierlaire },
title = {Functional approximations to alternative-specific constants in time-period choice-modelling},
booktitle = {Transportation and Traffic Theory. Flow, Dynamics and Human Interaction},
pages = {545-564},
editor = {Mahmassani, H. S.},
publisher = {Elsevier},
note = {ISBN:9780080446806},
year = {2005}
}