//-->
The double travelling salesman problem with multiple stacks - Formulation and heuristic solution approaches
Petersen, Hanne L., (2009)
An Optimization Algorithm for the Vehicle Routing Problem with Time Windows Based on Lagrangian Relaxation
Kohl, Niklas, (1997)
The A Priori Dynamic Traveling Salesman Problem with Time Windows
Larsen, Allan, (2004)