@article{JGAA_2013_17_2_a3,
     author = {Christian Bachmaier and Marco Matzeder},
     title = {Drawing {Unordered} {Trees} on {k-Grids}},
     journal = {Journal of Graph Algorithms and Applications},
     pages = {103--128},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {2013},
     doi = {10.7155/jgaa.00287},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.7155/jgaa.00287/}
}