@INPROCEEDINGS{Li:LevelingGrid:ALENEX2012, author = {Sabine Cornelsen and Andreas Karrenbauer and Shujun Li}, title = {Leveling the Grid}, booktitle = {Proceedings of the Meeting on Algorithm Engineering \& Experiments, Kyoto, Japan, January 16, 2012 (ALENEX 2012)}, year = {2012}, pages = {45-54}, publisher = {SIAM}, doi = {10.1137/1.9781611972924.4}, url = {http://epubs.siam.org/doi/abs/10.1137/1.9781611972924.4}, note = {preprint available online at \url{http://www.hooklee.com/pub.html}}, }