@TECHREPORT\{IMM2002-0859,
    author       = "J. Larsen",
    title        = "Speeding up the solution process for the Vehicle Routing Problem with Time Windows using structural information",
    year         = "2002",
    month        = "jun",
    number       = "",
    series       = "",
    institution  = "Informatics and Mathematical Modelling, Technical University of Denmark, {DTU}",
    address      = "Richard Petersens Plads, Building 321, {DK-}2800 Kgs. Lyngby",
    type         = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/859-full.html",
    abstract     = "Two ideas for using structural information for solving the Vehicle
  Routing Problem with Time Windows (VRPTW) is presented. The {VRPTW} is
  a generalization of the well known capacity constrained Vehicle
  Routing Problem (VRP). Both techniques are based on solving the
  {VRPTW} using a Branch-and-Price approach. They reveal a huge
  potential for using structural information when speeding up an
  exact approach without compromising optimality.",
    isbn_issn    = "9"
}