@article{articleafd7707c,
title   = {Symmetry-breaking constraints for packing identical rectangles within polyhedra},
author = {Abrantes, Ricardo Luiz de Andrade and Birgin, Ernesto Julian Goldberg},
year = {2011},
doi = {10.1007/s11590-011-0425-9},
journal   = {Optimization Letters}
}