Operations Research, Vol. 46, No. 3 (May - Jun., 1998), pp. 396-405 (10 pages) A new hierarchy of relaxations is presented that provides a unifying framework for constructing a spectrum of continuous ...

Julien Bramel, David Simchi-Levi, On the Effectiveness of Set Covering Formulations for the Vehicle Routing Problem with Time Windows, Operations Research, Vol. 45, No. 2 (Mar. - Apr., 1997), pp.