Transportation Research Part B: Methodological
Transportation Research Part B > 2008 > 42 > 3 > 204-228
Transportation Research Part B > 2011 > 45 > 1 > 232-254
Transportation Research Part B > 2008 > 42 > 3 > 204-228
Transportation Research Part B > 2011 > 45 > 1 > 232-254