@article{article111e504d,
title   = {An algorithm for the strip packing problem using collision free region and exact fitting placement},
author = {Sato, André Kubagawa and Martins, Thiago de Castro and Tsuzuki, Marcos de Sales Guerra},
year = {2012},
doi = {10.1016/j.cad.2012.03.004},
journal   = {Computer-Aided Design}
}