@inproceedings{inproceedings0aaa5482,
title   = {Heuristics based on lagrangian relaxation for the vehicle routing problem with time windows},
author = {Cunha, Cláudio Barbieri da and Gualda, Nicolau Dionísio Fares},
year = {2002},
publisher = {ISCTE},
booktitle   = {RIRL 2002 Rencontres Internacionales de la Recherche en Logistiques}
}