Patrizio Angelini Giuseppe Di Battista Maurizio Patrignani Computing a Minimum-Depth Planar Graph Embedding in <i>O</i> ( <i>n</i> <sup>4</sup>) Time. 287-299 2007 conf/wads/2007 WADS http://dx.doi.org/10.1007/978-3-540-73951-7_26 db/conf/wads/wads2007.html#AngeliniBP07