@ARTICLE {1395,
author={J. J. Júdice and P. Martins and J. Nunes},
doi={10.1016/j.cor.2004.04.011},
journal={Computers and Operations Research},
title={Workforce planning in a lotsize mail processing problem},
year={2005},
month={January},
volume={32},
number={1},
pages={3031-3058},
ISSN={0305-0548}
}