@TechReport{GoSwDuycSala09,
author = {Peter G. Swartz and Gaetan Duyckaerts and Matteo Salani },
title = {Ambush avoidance in Vehicle Routing for valuable delivery},
institution = {Transport and Mobility Laboratory, Ecole Polytechnique F\'ed\'erale de Lausanne},
number = {TRANSP-OR 091216},
year = {2009}
}