@article{article5905e81b,
title   = {A linear optimization approach to the combined production planning model},
author = {Gramani, Maria Cristina Nogueira and França, Paulo Morelato and Arenales, Marcos Nereu},
year = {2011},
doi = {10.1016/j.jfranklin.2010.05.010},
journal   = {Journal of the Franklin Institute}
}