@article{nw-dlhqm-11,
 author = {Nöllenburg, Martin and Wolff, Alexander},
 doi = {10.1109/TVCG.2010.81},
 journal = {{IEEE} Trans. Visualization and Computer Graphics},
 number = {5},
 pages = {626-641},
 title = {Drawing and Labeling High-Quality Metro Maps by Mixed-Integer Programming},
 volume = {17},
 year = {2011}
}