@article{JGAA_2015_19_1_a5,
     author = {Martin Fink and Sergey Pupyrev and Alexander Wolff},
     title = {Ordering {Metro} {Lines} by {Block} {Crossings}},
     journal = {Journal of Graph Algorithms and Applications},
     pages = {111--153},
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {2015},
     doi = {10.7155/jgaa.00351},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.7155/jgaa.00351/}
}