@article{article46019563,
title   = {A note on the approximability of cutting stock problems},
author = {Cintra, Glauber Ferreira and Miyazawa, Flavio Keidi and Wakabayashi, Yoshiko and Xavier, Eduardo C},
year = {2007},
doi = {10.1016/j.ejor.2005.09.053},
journal   = {European Journal of Operational Research}
}