Lagrangian duality applied to the vehicle routing problem with time windows. - Brian Kallehauge; Jesper Larsen; Oli B. G. Madsen (Comput. Oper. Res., 2006)

Path inequalities for the vehicle routing problem with time windows. - Brian Kallehauge; Natashia Boland; Oli B. G. Madsen (Networks, 2007)

Formulations and exact algorithms for the vehicle routing problem with time windows. - Brian Kallehauge (Comput. Oper. Res., 2008)