@Article{FrejBier07,
author = {Emma Frejinger and Michel Bierlaire },
title = {Capturing correlation with subnetworks in route choice models},
journal = {Transportation Research Part B: Methodological},
volume = {41},
number = {3},
pages = {363-378},
doi = {10.1016/j.trb.2006.06.003},
year = {2007}
}