@article{05493563,
title = {Upward planar drawings and switch-regularity heuristics.},
journal = {Journal of Graph Algorithms and Applications},
volume = {10},
year = {2006},
pages = {259-285},
zbl = {1161.68847},
language = {en},
url = {http://dml.mathdoc.fr/item/05493563}
}
Didimo, Walter. Upward planar drawings and switch-regularity heuristics.. Journal of Graph Algorithms and Applications, Tome 10 (2006) pp. 259-285. http://gdmltest.u-ga.fr/item/05493563/