@article{articlecafdec56,
title   = {An approach using Lagrangian: surrogate relaxation for lot-sizing with transportation costs},
author = {Molina, Flávio and Santos, Maristela Oliveira dos and Toledo, Franklina Maria Bragion de and Araujo, Silvio Alexandre de},
year = {2009},
doi = {10.1590/S0101-74382009000200002},
journal   = {Pesquisa Operacional}
}