TY  - JOUR
AU  - Patrick Healy
AU  - Karol Lynch
TI  - Building Blocks of Upward Planar Digraphs
JO  - Journal of Graph Algorithms and Applications
PY  - 2007
SP  - 3
EP  - 44
VL  - 11
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.7155/jgaa.00135/
DO  - 10.7155/jgaa.00135
LA  - en
ID  - JGAA_2007_11_1_a0
ER  -