Always-Binding Inequality Constraints and Efficient Traffic Flows, R. A. Abrams and J. N. Hagstrom, InfORMS 2009.
Relating Tolls to the Presence of Loops in Multicommodity Flows, J. N. Hagstrom and R. A. Abrams, InfORMS 2008.
Under Construction 14-Oct-2009 , JH.